Prick a pie with some force (6)
I believe the answer is:
pierce
'prick' is the definition.
(I know that prick is a kind of pierce)
'a pie with some force' is the wordplay.
'with some' becomes 'rc' (I can't explain this - if you can you should give a lot more credence to this answer).
'force' becomes 'e' (E is the symbol of electromotive force).
'pie'+'rc'+'e'='PIERCE'
Can you help me to learn more?
(Other definitions for pierce that I've seen before include "Impale" , "pink" , "Puncture or penetrate" , "Break skin of" , "Prick" .)