Answer:

BRIT

AnswerCrossword Clue
BRITPrince Charles, for one
BRITCorrespondent Hume
BRITLondoner, informally
BRITLiverpudlian, e.g.
BRITOne under Elizabeth II
BRITSpender of pounds
BRITU.K. denizen
BRITSayer of "I say!"
BRITUnion Jack flier
BRITYank's ally
BRITAvon lady, e.g.?
BRITTube rider, e.g.
BRITOne who might keep a torch in his boot
BRITBenedict Cumberbatch, e.g.
BRITBanger eater
BRITLift rider
BRIT"Blimey!" blurter
BRIT"I say!" sayer
BRITJohn or Lennon
BRITTelly watcher
BRITTony Blair, for one
BRITLondoner, e.g.
BRITOne with a spare in his boot
BRITBrolly carrier
BRITOne queued up for petrol
BRITBeatle, for example
BRITElton John or Paul McCartney, e.g.
BRITLiverpudlian, for one
BRITU.K. native
BRITElton John or Paul McCartney
BRITElton John, for one
BRITLondoner or Liverpudlian
BRITJohn Bull, for one
BRITDaphne of "Frasier," for one
BRITYank ally
BRITLiverpudlian or Londoner
BRITLondon lad
BRITShropshire citizen, for short
BRITBlighter from Blighty
BRITBlighty blighter