A great master, but the general is round the bend! (6)

I believe the answer is:

genius

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

'a great master' is the definition.
'genius' can be an answer for 'master' (thesaurus). I'm not certain of the 'a great' bit.

'the general is round the bend' is the wordplay.
'the general' becomes 'gen'.
'round' is an insertion indicator.
'the bend' becomes 'U' (a U-bend is a kind of bend - pipe under sink).
'is' placed around 'u' is 'ius'.
'gen'+'ius'='GENIUS'

'but' is the link.

Can you help me to learn more?

(Other definitions for genius that I've seen before include "Brilliant mind" , "Extraordinarily intelligent person" , "great idea?" , "A natural talent" , "Person of extraordinary intellectual power" .)

I've seen this clue in the Evening Standard.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.