House companion storing old drink (5)
I believe the answer is:
hooch
'drink' is the definition.
(hooch is a kind of drink)
'house companion storing old' is the wordplay.
'house' becomes 'ho' (abbreviation for house).
'companion' becomes 'ch' (Companion of Honour).
'storing' means one lot of letters goes inside another.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'ho'+'ch'='hoch'
'hoch' placed around 'o' is 'HOOCH'.
(Other definitions for hooch that I've seen before include "alcoholic drink" , "Illicit alcohol" , "moonshine" , "Strong illicit liquor" , "Illicit whisky" .)