Race to put down again (5)
I believe the answer is:
relay
This clue is a double definition.
'race' is the first definition.
(relay race)
'put down again' is the second definition.
('lay' can be a synonym for 'put down' so perhaps 'relay' is OK for 'put down again')
'to' acts as a link.
(Other definitions for relay that I've seen before include "Pass on - put down again" , "article in bank" , "track event" , "Team of workers" , "supplementary store of anything" .)