Celebrated grey eland variety (9)
I believe the answer is:
legendary
'celebrated' is the definition.
(thesaurus)
'grey eland variety' is the wordplay.
'variety' indicates an anagram.
'grey'+'eland'='greyeland'
'greyeland' is an anagram of 'LEGENDARY'.
(Other definitions for legendary that I've seen before include "Fabled, celebrated" , "Well-known" , "Mythical - very famous" , "From a fabulous traditional story" , "Based on myth or famous for achievements (9)" .)