French word of approval (3)
I believe the answer is:
bon
'french word of approval' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for bon that I've seen before include "'At the double, it's a sweet, good for the French (3)'" , "Repeated, it's a tasty sweet" , "C'est good in France" .)