Obtained in negotiation (3)
I believe the answer is:
got
'obtained' is the definition.
('get' can be a synonym of 'obtain')
'in negotiation' is the wordplay.
'in' indicates the answer is hidden within the clue.
'GOT' is hidden within 'negotiation'.
(Other definitions for got that I've seen before include "Caught" , "Received; understood" , "Obtained" , "Acquired" , "Landed" .)