Tough answers are too much for him (4)
I believe the answer is:
hans
'him' is the definition.
'tough answers are too much' is the wordplay.
'are too much' indicates a hidden word (the clue hides the answer plus unneeded letters).
'HANS' can be found hidden inside 'tough answers'.
'for' acts as a link.
(Other definitions for hans that I've seen before include "German name" , "-- Christian Andersen, writer" , "'... Christian Andersen, storyteller (4)'" .)