Britain's Blair (4)
I believe the answer is:
tony
'britain's blair' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tony that I've seen before include "Shortened man's name" , "award for work in theatre" , "Blair; having style (slang)" , "Weller senior's nomination" , "- - Adams, 7 legend" .)