1: West Head and Gap fully integrated! (5)
3: Have sheriff's helpers joined Nazi police (7)
4: Those with regrets reining in destroyers (7)
5: Penniless meal is fantastic (5)
6: Yeller eats two steak bones as Elly May's pet (7)
7: It's on the coast of Australia - a tree discovered by science (6,3)
8: Crooner Mel: famous, loveless, suffering (9)
12: Ties braids without ribbons at the front (9)
13: Prove guess in outright delight (9)
16: Little bit quiet about Old Dick before the end (7)
17: Gets bastion rebuilt (7)
18: Starting off, bent charm (7)
20: Leaders of South Korea in disgrace suffer slippages (5)
22: Belgian port getting rid of an idiot (5)
23: A chair may be material (5)