Sweet American lives in France, it’s true (6)
I believe the answer is:
honest
'true' is the definition.
(I know that true can be written as honest)
'sweet american lives in france it's' is the wordplay.
I cannot quite see how this works, but
'it's' could be 'es' ('e' can mean 'electronic' which is similar to 'IT') and 'es' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for honest that I've seen before include "See 1" , "Sincere, upright" , "Honorable and sincere" , "Trustworthy or candid" , "Straight up" .)