1: With Starr finally out, Hyde's plan simply loses traction in a way (11)
7: Oxygen is pretty amusing. (3)
10: Carelessly let teeth rot completely (2,3,6)
11: Zoo custodians hear significant animal noises (7)
13: Sailor to criticise abundant 19-across source (7)
15: Type of sketch taken from thin album (9)
17: Pound off top of door--what's inside? (5)
18: The Spanish derelict is too much for the church office holder (5)
19: One giving evidence, if ignored, would be more snappish (9)
20: As trail meanders, they're useful to a cowboy (7)
23: Resident's web terminal missing (7)
24: 27-across about starting off 1-down world unconditionally (2,3,2,4)
27: Beauty stripping top and bottom is an additional feature (3)
28: Mixed greens and teals, so dad's remodeled (6,5)