1 Set off hourly, do finish to fulfil obligation (11 17 15) (4,4,3,2)
8 Qualification for one having sex? (5)
9 Clumsily built men go to bed (6,2)
10 A set piece of music with no start and without end (7)
11/17/15 "Hot bodies" she titters as chap stutters punch line (4,3,7,2,3,6)
13 Stalk old woman and get conviction (5)
15 See 11
17 See 11
20 Return of wind covered up ulcer (5)
21 Man crashing wild party getting treatment (7)
23 Introduce something for the first time in Russian (11 17 15 ) (3,2,2)
25 Explain puzzle's instruction? (11 17 15) (4,2,2)
26 It's father's heart! Take pulse! (11 17 15) (5)
27 Uproar about river scene matching set (6,7)
1 Major artery in body part, with abstinence becomes rigid (11 17 15) (4,3,4)
2 Order to stop (5)
3 Tall order in the beer garden (4,2,3)
4 Erect, firm and prickly (11 17 15 ) (7)
5 Semen, as produced in a body (2,5)
6 Location of Indian takeaway say? (5)
7 Right to partake in drinks and dance; it’s where impressions are formed (5,4)
12 Could give a reason for bail and expel an unruly bunch (11)
14 Trail from bug on bottom (11 17 15) (3,6)
16 It might chafe one on right, slow down and roll over (9)
18 Component of tubeless tyre needs source of synthetic rubber (7)
19 Succulent plants or trees (7)
22 Dead gross ((?) 11 17 15) (3,2)
24 Trunks show up one’s balls (5)
1 Set off hourly, do finish to fulfil obligation (11 17 15) (4,4,3,2)