Part enemy played in compensation (9)
I believe the answer is:
repayment
'compensation' is the definition.
(thesaurus)
'part enemy played' is the wordplay.
'played' indicates anagramming the letters.
'part'+'enemy'='partenemy'
'partenemy' with letters rearranged gives 'REPAYMENT'.
'in' is the link.
(Other definitions for repayment that I've seen before include "Type of mortgage" , "Money refunded" , "Reimbursement" , "Refund" .)