Nobleman's tally (5)
I believe the answer is:
count
I believe this clue is a double definition.
'nobleman's' is the first definition.
(count is a type of aristocrat)
'tally' is the second definition.
(I know that tally can be written as count)
(Other definitions for count that I've seen before include "Determine number of; foreign nobleman" , "regard" , "Nobleman - enumerate" , "Tell - foreign nobleman" , "earl abroad" .)