Cause of vexation or irritation (5)
I believe the answer is:
peeve
(Other definitions for peeve that I've seen before include "Intensely annoy" , "bug" , "Get annoyed" , "Cause resentment" , "Cause to be annoyed, irritated, or resentful" .)
I believe the answer is:
peeve
(Other definitions for peeve that I've seen before include "Intensely annoy" , "bug" , "Get annoyed" , "Cause resentment" , "Cause to be annoyed, irritated, or resentful" .)