Saint with first-class return for the country (7)
I believe the answer is:
albania
'the country' is the definition.
(Albania is an example)
'saint with first-class return' is the wordplay.
'saint' becomes 'alban' (saint alban).
'with' means one lot of letters go next to another.
'first class' becomes 'ai' (A1 - top quality).
'return' is a reversal indicator.
'ai' in reverse letter order is 'ia'.
'alban'+'ia'='ALBANIA'
'for' is the link.
(Other definitions for albania that I've seen before include "Southeast European republic" , "One country" , "SE European country" , "Eastern European country" , "Tirana is the capital city" .)