Sarah's tormented badger (6)
I believe the answer is:
harass
'badger' is the definition.
(synonyms)
'sarah's tormented' is the wordplay.
'tormented' is an anagram indicator.
'sarahs' with letters rearranged gives 'HARASS'.
(Other definitions for harass that I've seen before include "Molest, annoy" , "Annoy persistently, persecute" , "Continually torment" , "Bother and annoy continuously" , "Vex - pester" .)