Fellow actor joins one accountant in this country (5,4)
I believe the answer is:
costa rica
'this country' is the definition.
(Costa Rica is an example)
'fellow actor joins one accountant' is the wordplay.
'fellow actor' becomes 'costar' (co-star is a kind of actor. I am not sure about the 'fellow' bit.).
'joins' says to put letters next to each other.
'one' becomes 'I' (Roman numeral).
'accountant' becomes 'ca' (abbreviation for chartered accountant).
'costar'+'i'+'ca'='COSTA RICA'
'in' is the link.
Can you help me to learn more?
(Other definitions for costa rica that I've seen before include "place in Central America" , "international team?" , "Central American country, capital San Jose" , "A Socratic kind of country in S America" , "source of coffee" .)