Resort in a sunny country (5)
I believe the answer is:
spain
'a sunny country' is the definition.
'Spain' can be an answer for 'country' (Spain is an example). I'm not sure about the 'a sunny' bit.
'resort in' is the wordplay.
'resort' becomes 'spa' (spa is a kind of resort).
'spa'+'in'='SPAIN'
Can you help me to learn more?
(Other definitions for spain that I've seen before include "Iberian country" , "Iberian 4" , "ditto" , "country of mostly dry mountains, going by air" , "Madrid is its capital" .)