Find something irritating and withdraw from event (7)
I believe the answer is:
scratch
'withdraw from event' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for scratch that I've seen before include "In golf, a handicap of zero strokes" , "slight injury" , "Pull out of match" , "Handicap where expected to make" , "Don't play" .)