Pulling power holds half of answer for deal (11)
I believe the answer is:
transaction
'deal' is the definition.
(thesaurus)
'pulling power holds half of answer' is the wordplay.
'pulling power' becomes 'traction' (I've seen this before).
'holds' means one lot of letters goes inside another.
'half of' indicates taking half.
'answer' cut in half is 'ans'.
'traction' going around 'ans' is 'TRANSACTION'.
'for' acts as a link.
(Other definitions for transaction that I've seen before include "Instance of buying/selling" , "Act of buying/selling" , "Deal, negotiation" , "Piece of business" .)