29 answers are thematic and are not further defined in their clues.
1 Bob got a degree in dance (5)
5 Worker on one day a year (8)
9 Cast back seaweed (4)
12 Shirt is fashionable (3)
14 Drunk greeting, stumble over words (7)
15 Nearly 49 minutes before start of explosion (3,4)
16 Hebrew's first drink at the local (5)
17 This French spirit I drank (6)
18 There, girl I see listening to sense (5)
19 Disregard sun to irradiate (8)
22 New-born? (4)
24 Numbers ignored on nudism dispute (6)
25 Mistakes in amateur sociologist (9)
28 Company man gives pointers (9)
29 Thumbs I lost (7)
33 Thumbs lift up my first half (7)
34 Pierre and Marie lost eye by using ear medications (5)
35 Starting to dress in a tie and juggling toy (7)
36 Mini nap after engineering kingbolt (7)
37 Darter breaks in clumsily with first dart (9)
40 Calculate around 4 points for recipient (9)
42 Male swan beginning a long task (6)
43 Plain dead (4)
46 In a state, in a state (8)
48 Late back, at midday, giving nothing away (5)
49 Prisoner on the inside has backing support (6)
53 In EU, BMI is back in charge (5)
54 Endlessly thumb through original Oxonian Review issues (7)
55 I'm about to start reading image data in Unix (7)
56 Bristle at whining nipper kicking off (3)
57 Timid man expresses surprise (4)
58 Brain imaging technique starts to identify trouble with Parisian's bad seizure (5,3)
59 Wise man writes paper on states (5)
1 Stupid criminal got caught (7)
2 I return, returning half measure (5)
3 Hostility toward masculinity (6)
4 Language has too many locatives to start with (1,1,1,1)
5 Chilli competes with fish (9)
6 Man lost in Beirut (7)
7 Idiot has no right to dream (4)
8 Prize sounds stately (5)
10 Physicist reading old English books of Genesis (8)
11 Number, around one, starting hundred on island (8)
13 Book written by old crone, Georgia and me (6)
20 Digs hid amid small mess for cleaners (10)
21 Vomit from beheading opponent (6)
23 On summit, remove every other doubt (6)
26 Meeting of knights, and equals? (5,5)
27 Artist and princess hesitate (6)
28 Reference unknown for direction to Darmstadt, for example (4)
29 Advantage to have river running through it (5)
30 Ecstasy huffed using nitrogen, not copper (6)
31 Satellite noise beginning to exasperate (6)
32 Turn load inside out (4)
34 Bobby Brown? (6)
37 Unsatisfactory return transport routine (9)
38 Uncle in chamber, taking tea, we hear (8)
39 Deliberate, without difficulty starting, can be altered and changed (8)
41 Points on the reading book (6)
42 US, America in revolution after secession of Arkansas (7)
44 Go-getters have active Mondays (7)
45 Britain sends back letter to terrorists (6)
47 Mineral is inert when properly treated (5)
50 A German in Britain, back making a living (5)
51 One after turning marshland into desert (4)
52 Drunk Cinzano to forget a rejection (4)
1 Bob got a degree in dance (5)