Way to love fashion in Warehouse (7)
I believe the answer is:
storage
'warehouse' is the definition.
('storage warehouse' can be a synonym of 'warehouse')
'way to love fashion' is the wordplay.
'way' becomes 'st'.
'to love' becomes 'o' (In tennis, 'love' means 'zero').
'fashion' becomes 'rage' (rage is a kind of fashion**).
'st'+'o'+'rage'='STORAGE'
'in' acts as a link.
(Other definitions for storage that I've seen before include "Charge for keeping" , "Space available for keeping goods" , "Place for putting items away" , "Stowage" , "Depository space for goods" .)