Record found in Dorothy's warehouse (5)
I believe the answer is:
depot
'warehouse' is the definition.
(I've seen this before)
'record found in dorothy's' is the wordplay.
'record' becomes 'EP' (abbreviation for extended play record).
'found in' is an insertion indicator.
'dorothy' becomes 'dot' (short for Dorothy).
'ep' put inside 'dot' is 'DEPOT'.
(Other definitions for depot that I've seen before include "Place where buses and trains are kept" , "storeroom" , "Regimental HQ" , "(Military) store" , "Storage location" .)