Choice the French relish (6)
I believe the answer is:
pickle
'relish' is the definition.
(pickle is a kind of relish)
'choice the french' is the wordplay.
'choice' becomes 'pick' ('pick' can be a synonym of 'choice').
'the french' becomes 'le'.
'pick'+'le'='PICKLE'
(Other definitions for pickle that I've seen before include "Relish; tricky situation" , "A preserved vegetable or a fine mess" , "Little" , "Steep - predicament" , "Immerse (object) in acid" .)