Old stuff I put together for food (8)
I believe the answer is:
pastrami
'food' is the definition.
(pastrami is a kind of food)
'old stuff i put together' is the wordplay.
'old' becomes 'past' (associated in meaning).
'stuff' becomes 'ram' (ram can mean to stuff or push).
'put together' means one lot of letters go next to another.
'past'+'ram'+'i'='PASTRAMI'
'for' acts as a link.
(Other definitions for pastrami that I've seen before include "Spiced smoked beef" , "Thinly sliced beef" , "smoked joint" , "Spiced sliced beef" , "Seasoned dish" .)