1: Plan to return with woman (3)
2: Very loud inside during youngsters' kind of ball (7)
3: Maverick starting to buck in wind (5)
4: Grouper swimming to make new formation (7)
5: Bats staying in dark (7)
6: Wild ermine encaged years here?! (9)
7: Free time is symbol of Hawaii, certainly (7)
8: Get into the archeology scene. (3)
11: Short line in letter back-fires (5)
14: I can still hit a little bit (9)
16: 19-across, perhaps, bites indeed (5)
18: Listen to more adventurous rock (7)
19: Land filled with rain is OK (7)
20: Apprentice relinquishes heart to temptress (7)
22: Scandinavian seafarers' six greatest leaders (7)
24: Mania distorted true inner self (5)
27: Rascal and wuss taking week off (3)