End of locks on very French braid (5)
I believe the answer is:
tress
'braid' is the definition.
('tress' can be a synonym of 'braid')
'end of locks on very french' is the wordplay.
'end of' indicates one should take the final letters.
'on' is a charade indicator (letters next to each other).
'very french' becomes 'tres' ('very' translated into French).
The final letter of 'locks' is 's'.
's' after 'tres' is 'TRESS'.
(Other definitions for tress that I've seen before include "Long piece of hair" , "Braid of hair" , "Long lock or plait of hair" , "Rests (anag.)" , "Curl - lock" .)