Excite; annoy (5)
I believe the answer is:
pique
This clue is a double definition.
'excite' is the first definition.
(I've seen this in another clue)
'annoy' is the second definition.
(thesaurus)
(Other definitions for pique that I've seen before include "Stimulate (one's curiosity)" , "Offence taken" , "Nettle" , "Resentment at a slight" , "nark" .)