Starts to shelter in the enclosed location (4)
I believe the answer is:
site
'location' is the definition.
(site is a kind of location)
'starts to shelter in the enclosed' is the wordplay.
'starts to' says to take the initial letters.
The first letters of 'shelter in the enclosed' is 'SITE'.
(Other definitions for site that I've seen before include "Designated place" , "Ties into building location" , "Building plot" , "Location; locate" , "setting" .)