Repeat of cup tie at 'Real' broadcast (12)
I believe the answer is:
recapitulate
'repeat' is the definition.
('recapitulate' can be a synonym of 'repeat')
'cup tie at real broadcast' is the wordplay.
'broadcast' indicates anagramming the letters.
'cup'+'tie'+'at'+'real'='cuptieatreal'
'cuptieatreal' is an anagram of 'RECAPITULATE'.
'of' is the link.
(Other definitions for recapitulate that I've seen before include "Go over in summary" , "go over old ground" , "Sum up" , "Repeat in summary" , "Go over the main points again" .)