Supplier of particular engine part (11)
I believe the answer is:
distributor
This clue could be a double definition.
'supplier of particular' is the first definition.
'distributor' can be an answer for 'supplier' (distributor is a kind of supplier). I am not certain of the 'of particular' bit.
'engine part' is the second definition.
(I've seen this before)
Can you help me to learn more?
(Other definitions for distributor that I've seen before include "engine part" , "Supplier of goods to retailers" , "Car engine component - marketing agent" , "Dealer" .)