An umpire applied, getting rejected (7)
I believe the answer is:
refused
'rejected' is the definition.
('refuse' can be a synonym of 'reject')
'an umpire applied getting' is the wordplay.
'an umpire' becomes 'ref' (short for referee).
'applied' becomes 'used' ('use' can be a synonym of 'apply').
'getting' is a charade indicator (letters next to each other).
'ref'+'used'='REFUSED'
(Other definitions for refused that I've seen before include "Declined, rejected" , "Was unwilling to accept" , "Said no (7)" , "turned down appeal" , "Not accepted" .)