Smoked meat I added to previous stuff (8)
I believe the answer is:
pastrami
'smoked meat' is the definition.
'i added to previous stuff' is the wordplay.
'added to' means one lot of letters go next to another.
'previous' becomes 'past' (similar in meaning).
'stuff' becomes 'ram' (ramming is a kind of stuffing).
'past'+'ram'='pastram'
'i' after 'pastram' is 'PASTRAMI'.
(Other definitions for pastrami that I've seen before include "Thinly sliced beef" , "Sliced cured beef" , "Tapered tuck; missile" , "Spiced sliced beef" , "smoked joint" .)