Aged Scots in hag's bottomless cooking pot? (8)

I believe the answer is:

cauldron

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'cooking pot?' is the definition.
'cauldron' can be an answer for 'pot?' (cauldron is a kind of pot). I'm not sure about the 'cooking' bit.

'aged scots in hag's bottomless' is the wordplay.
'aged scots' becomes 'auld' (I have seen 'Venerable Scots' mean 'auld' so perhaps 'scots' could also mean 'auld'. I am not sure about the 'aged' bit.).
'in' means one lot of letters goes inside another.
'hag' becomes 'crone' (synonyms).
'bottomless' means to remove the last letter.
'crone' with its last letter taken away is 'cron'.
'auld' placed inside 'cron' is 'CAULDRON'.

Can you help me to learn more?

(Other definitions for cauldron that I've seen before include "Very large pot used for boiling" , "Large cooking pot" , "Very large metal pot for boiling" , "Witches' vessel" , "A large deep pot for boiling things" .)

I've seen this clue in The Guardian.

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