please could someone help me with some answers to a cryptic crossword. thank you.
3a. good animal is free (6)
9a. Island created with fresh air (7)
10a. Rodent with an ailment isolated initially (6)
16a. Placate primate fed with vegetables (7)
20a. At peak, two students to appear in joint (7)
22a. Some cadet, a chap to cut off (6)
2d. Copy music endlessly composed behind time (8)
15d. Pasty pig swallows whole (6)