Coin a word that means teach without peripheral notes (5)
I believe the answer is:
ducat
'coin' is the definition.
(ducat is a kind of coin)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for ducat that I've seen before include "Old gold coin in e.g. Venice" , "Formerly a gold coin of several European countries" , "Ancient coin" , "Antique coin" , "Former Italian gold coin" .)