1: Prominent performer with Peru's wild climbing rodents (9)
2: Took a load off awfully thin ledge (9)
3: Pattern upset clients (7)
4: Relaxes about measure, but holds malice (7)
5: Relieve an opposition of a low-point (5)
7: Tendon's abnormal growth is in remission (5)
8: Memorandum maintains a balance (9)
11: UCLA urea tests involve internationally recognized scientists (9)
13: Persuade you to buy low-cal, so to speak, for unsightly fat (9)
14: Stabbed, bark 'A Kennedy' (9)
16: Embarrassed when a graduate took off (7)
17: Most organized, I'd interest in examination (7)
18: Pet name for pirate ship (5)
20: Noise of family gathering at the start (5)
22: Sister gets nothing, we hear (3)