Portions of pies containing some spice (6)
I believe the answer is:
pieces
'portions' is the definition.
(I know this)
'pies containing some spice' is the wordplay.
'containing' indicates putting letters inside.
'some spice' becomes 'ec' (I can't explain this - if you can you should give a lot more credence to this answer).
'pies' enclosing 'ec' is 'PIECES'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for pieces that I've seen before include "Chessmen" , "Portions, parts" , "Bits < of sandwiches" , "Fragments" , "barrels of wine" .)