Score tied in the end, bet off (4)
I believe the answer is:
debt
'score' is the definition.
(I've seen this in another clue)
'tied in the end bet off' is the wordplay.
'in the end' indicates one should take the final letters.
'off' indicates an anagram.
The last letter of 'tied' is 'd'.
'bet' is an anagram of 'ebt'.
'd'+'ebt'='DEBT'
(Other definitions for debt that I've seen before include "What's due" , "Commitment" , "Money owed or due" , "state of obligation" , "The state of owing something" .)