Central American fellow actor, trust me! (5,5)

I believe the answer is:

costa rican

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'central american' is the definition.
(Costa Rican is an example)

'fellow actor trust me' is the wordplay.
'fellow actor' becomes 'co-star'.
'trust me' becomes 'ican' (I am not sure about this - if you are sure you should believe this answer much more).
'costar'+'ican'='COSTA-RICAN'

Can you help me to learn more?

(Other definitions for costa rican that I've seen before include "from part of South America" , "Foreign" , "Countryman" , "maybe a Hispanic type" , "Latin American" .)

I've seen this clue in The Telegraph.

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