Holiday area, also coldest resort (5,3,3)
I believe the answer is:
costa del sol
'holiday area' is the definition.
(I've seen this before)
'also coldest resort' is the wordplay.
'resort' indicates an anagram (re-sort the letters).
'also'+'coldest'='alsocoldest'
'alsocoldest' with letters rearranged gives 'COSTA DEL SOL'.
(Other definitions for costa del sol that I've seen before include "Spanish resort region" , "In place of holiday" , "Spanish beach" , "Coast east of Gibraltar" , "Spanish coastal region" .)