Galling (7)
I believe the answer is:
irksome
'galling' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for irksome that I've seen before include "Annoying - tedious" , "Burdensome and tedious" , "'Annoying, irritating or boring (7)'" , "'Tedious, tiresome (7)'" , "Troublesome, vexing" .)