Critic of French farm equipment (9)
I believe the answer is:
detractor
'critic' is the definition.
(I've seen this before)
'of french farm equipment' is the wordplay.
'of french' becomes 'de' ('of' in French).
'farm equipment' becomes 'tractor' (I am not sure about this - if you are sure you should believe this answer much more).
'de'+'tractor'='DETRACTOR'
Can you help me to learn more?
(Other definitions for detractor that I've seen before include "one runs people down" , "Critic" , "I make uncomplimentary remarks" , "Slighter" , "One disparages or belittles" .)