Love tenet abused in story (9)
I believe the answer is:
novelette
'story' is the definition.
(I've seen this before)
'love tenet abused' is the wordplay.
'abused' indicates an anagram.
'love'+'tenet'='lovetenet'
'lovetenet' is an anagram of 'NOVELETTE'.
'in' acts as a link.
(Other definitions for novelette that I've seen before include "romance?" , "Short and light tale" , "Short book of fiction" , "Short work of fiction" , "Short story" .)