Gallant to have relic repaired (9)
I believe the answer is:
chevalier
'gallant' is the definition.
(thesaurus)
'have relic repaired' is the wordplay.
'repaired' is an anagram indicator.
'have'+'relic'='haverelic'
'haverelic' is an anagram of 'CHEVALIER'.
'to' is the link.
(Other definitions for chevalier that I've seen before include "Old (French) "knight"" , "French fighter" , "order of merit" , "French actor and singer" , "young Charlie?" .)