7  Right now I am extremely nonchalant holding bomb (8)

 8  Rent's increased, we hear (4)

 9  Negative response to gym being cancelled? (4)

10 Sense from man before a group (7)

12 Turned up and cooked rice for so long (11)

14 Sculpture embodying right quality (7)

16 Very dark in Indiana and Kentucky (4)

19 Forget nothing when Timothy returns (4)

20 Plain or new dairy confection (8)

21 Picks someone up front before ballots (10)

 1  Mature females without mature males (5)

 2  Captain's beginning to sell fish (7)

 3  Couple I encountered on the way up (4)

 4  Prepare to earn money? (3,5)

 5  Different hero evolved over time (5)

 6  Famous engineer in the end replaced by one in country (6)

11 All of us in England extremely concerned with etiquette at first (8)

12 Fall in Mississippi (6)

13 Met on train by arrangement (3,4)

15 His Lordship, say, is frequently strict with the French (5)

17 Battle many presaged to a degree (5)

18 Change as tide rises? (4)