Stand in use finally, after furious dispute (8)
I believe the answer is:
deputise
'stand in' is the definition.
(to deputise for someone is to stand in for them)
'use finally after furious dispute' is the wordplay.
'finally' suggests the final letters.
'after' is a charade indicator (letters next to each other).
'furious' indicates anagramming the letters (I've seen this in other clues).
The final letter of 'use' is 'e'.
'dispute' anagrammed gives 'deputis'.
'e' put after 'deputis' is 'DEPUTISE'.
(Other definitions for deputise that I've seen before include "Understudy" , "Appoint as a substitute" , "Act as delegate for a person" , "Appoint as stand-in" , "Stand in for" .)