Tally a nobleman (5)
I believe the answer is:
count
I believe this is a double definition.
'tally' is the first definition.
(synonyms)
'a nobleman' is the second definition.
(count is a kind of nobleman)
(Other definitions for count that I've seen before include "Matter to consider" , "Nobleman; tally" , "Cut some ice" , "European title" , "Sum up" .)