Benefit that should not be taken unfairly (9)
I believe the answer is:
advantage
'benefit' is the definition.
(I've seen this before)
'should not be taken unfairly' is the wordplay.
I cannot quite see how this works, but
'not' could be 'nt' (synonyms) and 'nt' is found within the answer.
This explanation may well be incorrect...
'that' acts as a link.
Can you help me to learn more?
(Other definitions for advantage that I've seen before include "Asset" , "Upper hand, benefit" , "Profit, tennis score" , "Benefit, profit" , "Superior or more favourable position" .)