Antifreeze essential initially in chopper (6)
I believe the answer is:
deicer
This clue could be a double definition.
'antifreeze' is the first definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'essential initially in chopper' is the second definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
Can you help me to learn more?
(Another definition for deicer that I've seen is " It melts".)