It's enough for British representative to take on beer perhaps (5)
I believe the answer is:
ample
'it's enough' is the definition.
(ample means enough or plenty)
'british representative to take on beer perhaps' is the wordplay.
I cannot really see how this works, but
'representative' could be 'mp' (Member of Parliament, a representative) and 'mp' is present in the answer.
'beer' could be 'ale' (type of beer) and 'ale' is found in the remaining letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'for' acts as a link.
Can you help me to learn more?
(Other definitions for ample that I've seen before include "Copious - abundant" , "Fairly large" , "Sealed glass container for dose of medicine" , "Large, accommodating" , "Generous" .)