Client I'm representing for raising boxing licence (6)
I believe the answer is:
permit
'licence' is the definition.
(I know that licence can be written as permit)
'client i'm representing for raising boxing' is the wordplay.
'boxing' indicates a hidden word (the solution is contained or boxed up by the clue).
'for raising' is a reversal indicator (in a down clue, letters go up).
'timrep' is hidden within 'client im representing'.
'timrep' written backwards gives 'PERMIT'.
(Other definitions for permit that I've seen before include "Consent to, allow" , "Warrant" , "Licence -- license" , "Allow - visa" , "Let - pass" .)