Become active in Antibes, tireless (6)
I believe the answer is:
bestir
'become active' is the definition.
(I've seen this before)
'in antibes tireless' is the wordplay.
'in' indicates a hidden word.
'BESTIR' is hidden within 'antibes tireless'.
(Other definitions for bestir that I've seen before include "Rouse (oneself)" , "Become active" , "Exert/rouse (oneself)" , "move" .)