Bury the hatchet relic once repaired (9)
I believe the answer is:
reconcile
'bury the hatchet' is the definition.
(thesaurus)
'relic once repaired' is the wordplay.
'repaired' is an anagram indicator.
'relic'+'once'='reliconce'
'reliconce' with letters rearranged gives 'RECONCILE'.
(Other definitions for reconcile that I've seen before include "Appease" , "Be on friendly terms again" , "Make up, make peace" , "Settle (a quarrel)" , "Puccini opera" .)