1: Childish nonsense before the last trip (5)
2: Pattern upset clients (7)
3: Got off the coach tired, on Eastern time (9)
4: Cleaning aid possessed by Fragonard (3)
5: Exchange concealed proprietary knowledge (5,6)
6: I, astride colt's mother with Donny's sister (5)
7: Old-fashioned pastor has dined inside (5)
8: No, Dr. Swift edited ' Windswept Bank' (9)
12: 27-across about starting off 1-down world unconditionally (2,3,2,4)
14: Breaking a vice can't prevent disease (9)
15: Harsh on Ian after sending back card (9)
17: Passionate, modern time (7)
19: One who follows Zeno to island in South Carolina (5)
20: Part turning two ways (5)
22: sliced again with cuter swing (5)
24: Neil lost a letter and ended up with nothing (3)