Le Bon compilation? Great! (5)
I believe the answer is:
noble
'great' is the definition.
(thesaurus)
'le bon compilation?' is the wordplay.
'compilation?' indicates anagramming the letters (letters compiled or organised differently).
'le'+'bon'='lebon'
'lebon' with letters rearranged gives 'NOBLE'.
(Other definitions for noble that I've seen before include "Having high moral qualities" , "Maybe count" , "Former gold coin" , "Of blue blood" , "Blue-blooded" .)