Shelter from exceptional sunshine a short time (6,3)
I believe the answer is:
nissen hut
'shelter' is the definition.
(Nissen hut is an example)
'exceptional sunshine a short time' is the wordplay.
'exceptional' is an anagram indicator.
'a short time' becomes 't' (abbreviation for time).
'sunshine' anagrammed gives 'nissenhu'.
'nissenhu'+'t'='NISSEN HUT'
'from' is the link.
(Other definitions for nissen hut that I've seen before include "metal shelter" , "Prefab" , "Corrugated iron shelter" , "Military shelter made of corrugated steel" , "Simple building" .)