1: Deplorable! Sad wife ugly every second (5)
2: Takes care of ugly dents (5)
3: Love nest a real sign of being pretty easy (3-4)
4: Exchange concealed proprietary knowledge (5,6)
5: Pronounced ability to smell negative votes (3)
7: Curing bad meat in English river (9)
8: Doctor singes off top of sore and bandages (9)
10: Titan is finally cut short (5)
13: Farmyard creatures defining an unlikely story? (4,3,4)
14: St. Michael transforms metal transformer (9)
15: Green coat for Italian composer and Spanish painter (9)
18: A supporter starting to mock President Garfield's middle name (5)
20: Slimeball guards existence in French refuge (7)
23: This is always resplendent, adorning heads (5)
24: Detailed map I sent off (5)
26: Greek characters suggest dawn (3)