Get the better of teacher (6)

I believe the answer is:

master

I'm a little stuck... Click here to teach me more about this clue!

This clue could be a double definition.

'get the better' is the first definition.
'master' can be an answer for 'get' (thesaurus). I am unsure of the 'the better' bit.

'teacher' is the second definition.
(I've seen this before)

'of' acts as a link.

Can you help me to learn more?

(Other definitions for master that I've seen before include "Overcome; original copy" , "Very good chess player" , "Craftsperson of great skill" , "Maestro; teacher" , "Skilled practitioner" .)

I've seen this clue in The Irish News.

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