To badger (6)
I believe the answer is:
harass
'to badger' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for harass that I've seen before include "Annoy persistently, persecute" , "Bother and annoy continuously" , "Disturb < badger" , "Intimidate, torment" , "Constantly torment" .)