4 Best place from which to watch a splendid defensive action? (10)
12 What witch may use to live thus - magic, primarily (5)
16 Safe mostly holds a form of oil made from leaf-stalk (7)
17 Quick movement everyone needs to capture a bird (10)
18 Reports meant tests having to be organised (10)
19 Hear out novel writer (7)
21 A free description of desert (4)
22 Invites trouble with silly-ass kin (4,2)
24 States of German girl coming back in somewhat chesty (7)
25 Set to give a leg up (3)
26 Skinned head off caught morays (5)
27 For that reason he comes in to negotiate (7)
29 Tiger seen wandering African plain (9)
32 A choice of letters in former days (4)
34 Animal seen next to mountain ash originally, or another tree (7)
37 But it's not the front part of the train (3,3)
38 Others, breaking into post office, get fast passage (6)
42 Could be a charter right away for internal airline (7)
45 Shed a little light (5)
46 Faithful Spanish servant cooking nachos (6)
48 A main diversion from the innermost membranes (5)
51 Habitat of razorbill, so to speak? (5)
52 Expel lawyer from Pluto's Dive (6)
53 A bishop with an island off the Scottish coast (5)
56 It brings a guy down to earth (4-3)
57 In a book about hydrogen (2,4)
58 Still rings up, nevertheless (4,2)
59 Pursued by crazy nude in a carrier (7)
63 Was wrecked and a number took to the water (4)
64 Speed of delivery? (5-4)
67 One's at pains to satisfy them (7)
69 With inner energy, a sailor hoisted rope (5)
71 Cunning and out to be slippery? (3)
73 One's invested by a backward sort (7)
77 Where one's high yet might be down (6)
78 Engine noise made by right propeller (4)
79 The grease inside fades and they keep dishes clean (7)
80 Nurse accepted it is inflammation (10)
81 Urge to have drink and a snack (3,2,5)
82 Prepares afresh for the press when it is found in the grass (2-5)
83 Change opinion of jazz (5)
84 Kerry nines unwound in the county town of Clare (10)

1 A rider is all for a recess (5)
2 Not calling a spade a spade could make a pitch more original (10)
3 Overfast? (6)
5 Animal came 'ither by boat, we hear (3,4)
6 Girl with talent, we hear, featuring in yearbook (7)
7 Indication of cold joints, we hear (5)
8 Seeming all cold and wet (6)
9 On reflection, a must as a fruit (7)
10 Together with a name in the register (5)
11 Nor would it follow if I were in here below (6)
12 Result of a disappointment in love - hater, perhaps? (6,5)
13 No head on the beer, that is strange (5)
14 Impressive plea for restitution (4)
15 Shaping a strip of wood (8)
20 Outstanding chess player in compound (6)
23 Excess of petrol has mostly dispersed (8)
27 Study Greek grammar: go warily - this'll be heard (5)
28 Elizabethan compother'th prayer scarf? (7)
30 The top of every poppyhead's pungent - as well as this heath-like plant from Australia (7)
31 Still it's regular at present (4,3)
33 Delivery man? (7)
35 Chuck has cannabis, the stupid man (7)
36 Bill dislikes Aeneas's friend (7)
39 Coughed up for fancy footwear (4)
40 Two or three to a cell? ... (4-7)
41 Speech from one's lord in the days of Viking rule? (3,5)
43 That's enough to make one acid to be in a cell (3)
44 A poor actor turned nurse (4)
47 A man from over the sea - Bengal maybe (3)
49 Tritium may produce a state of under-development (10)
50 Coughs requiring attention? (5)
54 He takes newlyweds to see Scottish islands (8)
55 Love, go in for the contest, please - here in Spain (6)
60 Silly fellow allows one seeded portions (7)
61 Increasingly smart - and that's admitted by doctor (7)
62 74 Dn or another person to do the festooning? (7)
65 Girl with great boxer and boy (6)
66 Open sound of French composer (6)
68 Still it could affect one's reception (6)
70 Heavyweight gets round a novice with a hook (5)
72 Try Ulan Bator to find a magnolia (5)
74 Some woman dreams about him (5)
75 Painting surface covered in stages sometimes (5)
76 Musical featuring two soldiers (4)