Put forward assassin? (5)
I believe the answer is:
offer
This clue is a double definition.
'put forward' is the first definition.
(I've seen this in another clue)
'assassin?' is the second definition.
(someone who 'offs' people)
(Other definitions for offer that I've seen before include "Chance to buy at reduced price?" , "Proposal (of marriage)" , "Tender for acceptance" , "Expression of willingness to pay or give" , "Bid; proposal" .)