Offer bishop identification (3)
I believe the answer is:
bid
'offer' is the definition.
(synonyms)
'bishop identification' is the wordplay.
'bishop' becomes 'B' (chess abbreviation).
'identification' becomes 'ID' (abbreviation).
'b'+'id'='BID'
(Other definitions for bid that I've seen before include "Make offer for 20 Down" , "Offer a sum of money to buy" , "Attempt, offer" , "Offer; command" , "Offer a price" .)