Become agitated, if husband leaves? Get stuffed (8)
I believe the answer is:
overheat
'become agitated' is the definition.
'husband leaves? get stuffed' is the wordplay.
I cannot really see how this works, but
'husband' could be 'h' and 'h' is found in the answer.
The remaining letters 'overeat' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
'if' acts as a link.
(Other definitions for overheat that I've seen before include "burn" , "get sunstroke?" , "Get too hot" , "Become too warm" , "Subject to excessive temperature" .)