I'm back with French friend in Florida (5)
I believe the answer is:
miami
'in florida' is the definition.
('Miami' is part of 'florida')
'i'm back with french friend' is the wordplay.
'back' shows that the letters should be reversed in order.
'with' says to put letters next to each other.
'french friend' becomes 'ami' (I've seen this in another clue).
'im' backwards is 'mi'.
'mi'+'ami'='MIAMI'
(Other definitions for miami that I've seen before include "Floridian city" , "Prejudice in favour of one person or thing" , "US city" , "state" , "Popular sun-city of Florida" .)