The result of arbitration is a drawback (5)
I believe the answer is:
award
'the result of arbitration' is the definition.
I can't tell whether this definition defines the answer.
'a drawback' is the wordplay.
'drawback' becomes 'ward' (I've seen this in other clues).
'a'+'ward'='AWARD'
'is' is the link.
Can you help me to learn more?
(Other definitions for award that I've seen before include "Oscar, say" , "Perhaps Tony" , "certificate?" , "Prize or other mark of recognition" , "Honour, accolade." .)