Release Dynamic Duo in port around Cuba (10)
I believe the answer is:
production
'release' is the definition.
(a film release is a production)
'dynamic duo in port around cuba' is the wordplay.
'dynamic' indicates an anagram (dynamic means changing or active).
'around' is an insertion indicator.
'cuba' becomes 'c'.
'duo'+'in'+'port'='duoinport'
'duoinport' is an anagram of 'prodution'.
'prodution' enclosing 'c' is 'PRODUCTION'.
(Other definitions for production that I've seen before include "numbers coming off line" , "thing manufactured" , "drama, say" , "... making" .)