French for "no" (3)
I believe the answer is:
non
'french for no' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for non that I've seen before include "Prefix meaning negative" , "Prefixed negation of a word" , "Negative French word" , "Combining form meaning not" , "Prefix meaning not or none" .)