Dried soup ingredient (se_ed?) (5,3)
I believe the answer is:
split pea
'dried soup' is the definition.
'split-pea' can be an answer for 'soup' (split-pea soup is a kind of soup). I'm not certain of the 'dried' bit.
'ingredient seed?' is the wordplay.
'ingredient' becomes 'split' (I can't explain this - if you can you should believe this answer much more).
'seed?' becomes 'pea' (I've seen this before).
'split'+'pea'='SPLIT-PEA'
Can you help me to learn more?
(Other definitions for split pea that I've seen before include "A stipple (anag.)" , "What's ready to add to casserole" , "Dried vegetable" , "Pulse" .)