Enumerates the noblemen (6)
I believe the answer is:
counts
This clue is a double definition.
'enumerates' is the first definition.
('count' can be a synonym of 'enumerate')
'the noblemen' is the second definition.
(count is a kind of nobleman)
(Other definitions for counts that I've seen before include "Enumerates like minor aristocracy" , "Determines the number of" , "Numbers" .)