Irritates, vexes (6)
I believe the answer is:
annoys
This clue is a double definition.
'irritates' is the first definition.
(I've seen this before)
'vexes' is the second definition.
(I've seen this before)
(Other definitions for annoys that I've seen before include "Bugs" , "Hacks off" , "Irritates, vexes" , "Irritates, bothers" , "grates" .)