Stuff made from dairy product with no indicator of additives (4)
I believe the answer is:
cram
'stuff' is the definition.
(cramming is a kind of stuffing)
'dairy product with no indicator of additives' is the wordplay.
'dairy product' becomes 'cream' (cream is a kind of dairy product).
'with no' suggests deleting specific letters.
'indicator of additives' becomes 'E' (as in E numbers).
'cream' with 'e' taken away is 'CRAM'.
'made from' acts as a link.
(Other definitions for cram that I've seen before include "Study hard for exam" , "Quickly learn - stuff" , "Greedily eat" , "Pack in or study hard" , "jam" .)