Crook that’s put on British accent (6)
I believe the answer is:
brogue
'accent' is the definition.
(brogue can mean a Scottish or Irish accent)
'crook that's put on british' is the wordplay.
I cannot quite see how this works, but
'british' could be 'br' (abbreviation for British) and 'br' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for brogue that I've seen before include "Irish accent or strong shoe" , "Footprint could be left by this" , "Outdoor shoe; accent" , "What might identify an Irishman" , "Decorated shoe; accent" .)