Complain out loud when cut (4)
I believe the answer is:
mown
'cut' is the definition.
(past tense of 'mow')
'complain out loud' is the wordplay.
'complain' becomes 'moan' (moan can mean to complain or whinge).
'out loud' indicates a 'sounds like' (homophone) clue.
'moan' is a homophone of 'MOWN'.
'when' acts as a link.
(Other definitions for mown that I've seen before include "Cut down with a blade" , "(Of grass) cut" , "Block of cast metal" .)