Costa del Sol resort (6)
I believe the answer is:
malaga
'costa del sol resort' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for malaga that I've seen before include "Spanish city and holiday resort" , "City of Andalusia" , "Andalusian port; wine" , "Army rank; not shared" , "Resort in Andalusia" .)