Story about abstainer's gossip (6)
I believe the answer is:
tattle
'gossip' is the definition.
(thesaurus)
'story about abstainer's' is the wordplay.
'story' becomes 'tale' ('tale' can be a synonym of 'story').
'about' is an insertion indicator.
'abstainer' becomes 'tt' (I've seen this in other clues).
'tale' enclosing 'tt' is 'TATTLE'.
(Other definitions for tattle that I've seen before include "'Gossip, idle talk (6)'" , "Chatter idly" , "Inform on someone" , "Divulge secrets" , "Tell tales" .)