Something that gives it a printer's measure (4)
I believe the answer is:
item
'something that' is the definition.
'item' can be an answer for 'something' (item means a thing). I am not sure about the remainder of the definition.
'it a printer's measure' is the wordplay.
'a printer's measure' becomes 'em'.
'it'+'em'='ITEM'
'gives' is the link.
Can you help me to learn more?
(Other definitions for item that I've seen before include "couple linked" , "Individual thing" , "two with a link" , "Piece in paper" , "newspaper article" .)