Caribbean actor in Peru, improvised (6,5)
I believe the answer is:
puerto rican
'caribbean' is the definition.
(Puerto Rico is a Caribbean island)
'actor in peru improvised' is the wordplay.
'improvised' is an anagram indicator (I've seen this in other clues).
'actor'+'in'+'peru'='actorinperu'
'actorinperu' is an anagram of 'PUERTO RICAN'.
(Other definitions for puerto rican that I've seen before include "Caribbean from San Juan, perhaps" , "Islander" .)