Snickers producer (4)
I believe the answer is:
mars
'snickers producer' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for mars that I've seen before include "Where Beagle 2 was landed on 25 December 2003" , "Holst's Bringer of War" , "blights" , "March to the French" , "Spoils - heavenly body" .)