2: Like a high ranking diplomat's awful ambrosia salad (13)
8: Music drama can go endlessly on (9)
9: Understood I engaged in diplomacy (5)
11: Enough messing with me, pal (5)
13: Ban professional writer (9)
15: Shower time, Bonzo? Spring, I hear (5)
16: Taverns quoted cool clique (3)
17: Man, what an avant-garde US artist! (3)
18: Lodge heard discharge (5)
20: 4-down Arias hit high note in some of the lungs (3,3)
21: In love with copper? Gone to give the needle? (9)
23: Melodious vocal rendition of musical composition (5)
24: On return, for example, put back costume (3-2)
25: Strange set-back overwhelms blundering bravado (7-2)
27: Shredded chad, he decrees, is one ingredient (7,6)