Fan of country found in shop at Rio terminal (7)
I believe the answer is:
patriot
'fan of country' is the definition.
'in shop at rio terminal' is the wordplay.
'in' says the answer is hidden in the clue.
'PATRIOT' is hidden within 'shop at rio terminal'.
'found' is the link.
(Other definitions for patriot that I've seen before include "Tell perhaps" , "New England sportsman" , "One loving their country" , "Chauvinist" , "A lover of fatherland" .)