The Three Wise Men (4)
I believe the answer is:
magi
'the three wise men' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for magi that I've seen before include "Wise men, visitors to Bethlehem" , "Sorcerers in ancient times" , "Christmas travellers" , "Nativity story wise men" , "Bearers of gold, frankincense and myrrh?" .)