Troubled wife avoids fights with son (8)
I believe the answer is:
restless
'troubled' is the definition.
(thesaurus)
'wife avoids fights with son' is the wordplay.
I cannot quite understand how this works, but
'son' could be 'ss' (I've seen this in other clues) and 'ss' is located in the answer.
This may be the basis of clue (or it may be nonsense).
(Other definitions for restless that I've seen before include "Always on the move" , "Unable to keep still" , "Uneasy, unable to relax" , "Constantly moving about or fidgeting" , "Ill at ease" .)