Trace out the French molasses (7)
I believe the answer is:
treacle
'molasses' is the definition.
(thesaurus)
'trace out the french' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'the french' becomes 'le'.
'trace' is an anagram of 'treac'.
'treac'+'le'='TREACLE'
(Other definitions for treacle that I've seen before include "Dark viscous 11" , "Contrived sentimentality - sticky substance" , "Golden syrup" , "Thick syrup from sugar cane" , "Sticky produce" .)