Hound British bird of prey (6)
I believe the answer is:
beagle
'hound' is the definition.
(I know that beagle is a hound)
'british bird of prey' is the wordplay.
'british' becomes 'b' (abbreviation e.g. in BBC).
'bird of prey' becomes 'eagle' (eagle is a kind of bird of prey).
'b'+'eagle'='BEAGLE'
(Other definitions for beagle that I've seen before include "Hunting dog followed on foot" , "Hound dog" , "Small hunting dog" , "Small short-legged hound" , "hunting animal with smooth coat" .)