Let tune kept hot go to pot, get ready for a cuppa (3,3,6,2)

I believe the answer is:

put the kettle on

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

'ready for a cuppa' is the definition.
I know nothing about this answer so I can't judge whether this works.

'let tune kept hot go to pot' is the wordplay.
'go to pot' is an anagram indicator.
'let'+'tune'+'kept'+'hot'='lettunekepthot'
'lettunekepthot' with letters rearranged gives 'PUT THE KETTLE ON'.

'get' acts as a link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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.