Crossword Genius

Master, teacher holding me back (5)

Ross

I believe the answer is:

demon

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

'master' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps you can see a link between them that I don't see?

'teacher holding me back' is the wordplay.
'teacher' becomes 'don' (don is a kind of teacher).
'holding' means one lot of letters goes inside another.
'back' says the letters should be written in reverse.
'me' back-to-front is 'em'.
'don' enclosing 'em' is 'DEMON'.

Can you help me to learn more?

(Other definitions for demon that I've seen before include "ace" , "Inspiring force" , "Evil spirit, devil" , "Monster" , "Bad spirit" .)

I've seen this clue in The Telegraph.
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