Hall of Famers (6)
I believe the answer is:
greats
'hall of famers' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for greats that I've seen before include "Certain final honours exams at Oxford" , "Oxford examinations" , "Classics, philosophy and ancient history (Oxford)" , "Exams at Oxford; sounds like fireplaces" , "Course" .)