2: Teen unclothes poorly dressed diners (13)
8: Real idiot's rewritten opinion piece (9)
11: Father Brown's latest femme fatale (5)
12: Come before chief of police, and back off (7)
13: Strip of soil bearing large heads of Belgian endive (7)
15: Drunk rises, holding tubular headgear (3,4)
16: Feel sick from crack? (3)
17: 4-down Arias hit high note in some of the lungs (3,3)
18: He wrote a bit of poetry! (3)
19: Taverns quoted cool clique (3)
20: Vice exploits body cavities (7)
22: Sterne's novel settlers (7)
24: Call back upstart by the Spanish king of old Portugal (7)
25: Bury with arms and legs but no head (5)
27: A language one may read about (9)
28: Canadian water ordered for regal tea-break (5,4,4)