Short greetings (3)
I believe the answer is:
his
'short greetings' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for his that I've seen before include "that chap's" , "It belongs to him" , "Belonging to that man" , "To - Coy Mistress (Marvell)" , "Belonging to the male" .)