One name put forward beforehand (2,7)
I believe the answer is:
in advance
'beforehand' is the definition.
('in advance' can be a synonym of 'beforehand')
'one name put forward' is the wordplay.
'one' becomes 'i' (Roman numeral).
'name' becomes 'n' (common abbreviation e.g. on forms).
'put' means one lot of letters go next to another.
'forward' becomes 'advance'.
'i'+'n'+'advance'='IN ADVANCE'
(Other definitions for in advance that I've seen before include "Beforehand - can invade accordingly (2.7)" , "Before the event" , "Ahead in place or time" , "early" .)