Mark taking control of record store (5)
I believe the answer is:
depot
'store' is the definition.
(depot can mean a store or warehouse)
'mark taking control of record' is the wordplay.
'mark' becomes 'dot' (dotting is a kind of marking).
'taking control of' indicates putting letters inside.
'record' becomes 'EP' (abbreviation for extended play record).
'dot' placed around 'ep' is 'DEPOT'.
(Other definitions for depot that I've seen before include "Storehouse, repository" , "Opted (anag)" , "bus terminus" , "Bus station in the US" , "Place where buses and trains are kept" .)