Gives up — leaves (5)
I believe the answer is:
quits
I believe this is a double definition.
'gives up' is the first definition.
('quit' can be a synonym of 'give up')
'leaves' is the second definition.
(quitting is a kind of leaving)
(Other definitions for quits that I've seen before include "Even - leaves" , "Abandons" , "On even terms again" , "Leaves - all square" , "On equal terms" .)