Male honorific (3)
I believe the answer is:
sir
'male honorific' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sir that I've seen before include "Noble title of undesirable kind" , "Formal and deferential address to a man" , "Honourable title" , "Polite term of address for a man" , "Male form of address" .)