Matters for noblemen (6)
I believe the answer is:
counts
This could be a double definition.
'matters for' is the first definition.
'counts' can be an answer for 'matters' (count can mean to matter or be significant). I am not sure about the 'for' bit.
'noblemen' is the second definition.
(count is a kind of nobleman)
Can you help me to learn more?
(Other definitions for counts that I've seen before include "Enumerates like minor aristocracy" , "Numbers" , "Determines the number of" .)