Complain to key craftsman (9)
I believe the answer is:
carpenter
'craftsman' is the definition.
(I know that carpenter is a type of woodworker)
'complain to key' is the wordplay.
'complain' becomes 'carp' (carp can informally mean to complain or whinge).
'to key' becomes 'enter' (key on a computer keyboard).
'carp'+'enter'='CARPENTER'
(Other definitions for carpenter that I've seen before include "Joseph's occupation" , "What Jesus was" , "job" , "artisan" , "Woodworker (Quince)" .)