Sweetmeat I will put in dough mixture (8)
I believe the answer is:
pastille
'sweetmeat' is the definition.
(pastille is a kind of sweetmeat)
'i will put in dough mixture' is the wordplay.
'i will' becomes 'I'll' (abbreviation).
'put in' indicates putting letters inside (back).
'dough mixture' becomes 'paste' (I can't explain this - if you can you should believe this answer much more).
'ill' placed into 'paste' is 'PASTILLE'.
Can you help me to learn more?
(Other definitions for pastille that I've seen before include "List plea for the small sweet" , "Suck this" , "Flavoured sweet for sucking" , "Lozenge, to soothe the throat perhaps" , "drop" .)