Drunk, adversely affected by sport (3,5,3,4)
I believe the answer is:
the worse for wear
'drunk' is the definition.
(I've seen this before)
'adversely affected by sport' is the wordplay.
I cannot really see how this works, but
'sport' could be 'wear' (I've seen this before) and 'wear' is found within the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for the worse for wear that I've seen before include "Drunk (colloq.)" , "Shabby; drunk" , "Tired and emotional" .)