3d Begin to go down after fish and chips (9) ??R???T??
16d Sailor climbing up on ship missing the last rope of rigging (7)
17 Country chap is held up outside biblical city (7)...
21d Gloomy surrounded by very big smells (6)
11a Title and group's sound endlessly reviewed (10) ??S E S O
19d Go back on promise arising in naive generosity (6)...
13a Something A-level maths student does to achieve distinction (15)
21a Volume set aside for drinker (6-5,4) 6-?A?L?,?O??
15a Work is not bad,offering possibilities (7)...