Something made for passageway (7)
I believe the answer is:
product
'something made' is the definition.
I can't judge whether this definition defines the answer.
'for passageway' is the wordplay.
'for' becomes 'pro' (as in being 'pro' something).
'passageway' becomes 'duct' (duct is a kind of passageway).
'pro'+'duct'='PRODUCT'
Can you help me to learn more?
(Other definitions for product that I've seen before include "Manufactured article for sale" , "See 5" , "Drop cut (anag.)" , "Result of multiplication" , "Commodity offered for sale" .)