Wise men one publication introduces (4)
I believe the answer is:
magi
'wise men' is the definition.
(the three wise men from the nativity)
'one publication introduces' is the wordplay.
'one' becomes 'i' (Roman numeral).
'publication' becomes 'mag' (abbreviation for magazine).
'introduces' is a charade indicator (letters next to each other) (some letters come before or introduce others).
'i' after 'mag' is 'MAGI'.
(Other definitions for magi that I've seen before include "Caspar, Melchior and Balthazar" , "men on special quest" , "The Three Kings" , "Three Wise Men from the East" , "Priests" .)