Store providing new hats at central Ruislip (5)
I believe the answer is:
stash
'store' is the definition.
(stash is a kind of store)
'new hats at central ruislip' is the wordplay.
'new' indicates an anagram.
'at' is a charade indicator (letters next to each other) (I've seen this in other clues).
'central' says to take the centre.
The central letter of 'ruislip' is 's'.
'hats' with letters rearranged gives 'tash'.
'tash' after 's' is 'STASH'.
'providing' acts as a link.
(Other definitions for stash that I've seen before include "Treasure trove" , "Consignment of drugs" , "collection" , "Hide in a secret place" , "Stow away" .)