Before end of rubber, draw level (4)
I believe the answer is:
tier
'level' is the definition.
('tier' can be a synonym of 'level')
'before end of rubber draw' is the wordplay.
'before' says to put letters next to each other.
'end of' indicates one should take the final letters.
'draw' becomes 'tie' ('tie' can be a synonym of 'draw').
The last letter of 'rubber' is 'r'.
'r' put after 'tie' is 'TIER'.
(Other definitions for tier that I've seen before include "'Level, grade (4)'" , "Level of a structure" , "Hierarchical level" , "Rank - row" , "Echelon" .)