Fellow works to produce plan (9)
I believe the answer is:
manoeuvre
'plan' is the definition.
(manoeuvre is a kind of plan)
'fellow works' is the wordplay.
'fellow' becomes 'man' (I've seen this before).
'works' becomes 'oeuvre' ('oeuvre' can be a synonym of 'works'**).
'man'+'oeuvre'='MANOEUVRE'
'to produce' is the link.
(Other definitions for manoeuvre that I've seen before include "move smartly" , "Engineer" , "See 16" , "Clever stratagem" , "plan" .)