Get over being annoyed (5)
I believe the answer is:
cross
I believe this is a triple definition!
'get' is the first definition.
(thesaurus)
'over' is the second definition.
(thesaurus)
'being annoyed' is the third definition.
(I've seen this before)
(Other definitions for cross that I've seen before include "Put out" , "Emblem of Christianity" , "Stand in the way of" , "Mad" , "Mark; hybrid" .)