Fail and try in a different way to find fault (7)
I believe the answer is:
frailty
'fault' is the definition.
(thesaurus)
'fail and try in a different way' is the wordplay.
'and' is a charade indicator (letters next to each other).
'in a different way' indicates an anagram (letters ordered a new way).
'fail' put after 'try' is 'tryfail'.
'tryfail' is an anagram of 'FRAILTY'.
'to find' acts as a link.
(Other definitions for frailty that I've seen before include "Its name is woman (Hamlet)" , "Shakespeare: '. . . . . . ., thy name is woman!'" , "Weakness" , "Debility, feebleness" , "Weak state, moral or physical" .)