Crowd you may hear in store (5)
I believe the answer is:
hoard
'store' is the definition.
(I know that hoard is a more specific form of the action store)
'crowd you may hear' is the wordplay.
'crowd' becomes 'horde' (horde is a kind of crowd).
'you may hear' indicates a 'sounds like' (homophone) clue.
'horde' sounds like 'HOARD'.
'in' acts as a link.
(Other definitions for hoard that I've seen before include "Store of money etc, often hidden" , "Amass and store privately" , "Store of money or valuables" , "Stockpile" , "Cache" .)