Skilled worker with visual representations is a knight (7)
I believe the answer is:
artisan
'skilled worker' is the definition.
(artisan is a kind of skilled worker)
'visual representations is a knight' is the wordplay.
'visual representations' becomes 'art' (visual arts).
'knight' becomes 'N' (chess abbreviation).
'art'+'is'+'a'+'n'='ARTISAN'
'with' is the link.
(Other definitions for artisan that I've seen before include "Skilled worker at craft or trade" , "Crafty sort" , "Skilled manual 17" , "Train as (anag) - craftsman" , "Skilled worker or craftsman" .)