Note exclamation of annoyance (3)
I believe the answer is:
doh
I believe this clue is a double definition.
'note' is the first definition.
(alternative spelling of 'do' as in do re mi)
'exclamation of annoyance' is the second definition.
(Homer Simpson's annoyed exclamation)
(Other definitions for doh that I've seen before include "First note of tonic sol-fa scale" , "an exclamation from someone who's annoyed with himself" , "for 7 [HOMER] of course!" , "acknowledgment of stupidity" , "It begins the tonic solfa" .)