Crossword Genius

All in one cooking vessel? (3)

Ross

I believe the answer is:

pan

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

'cooking vessel?' is the definition.
(I've seen this before)

'all in one' is the wordplay.
I cannot really see how this works, but
'one' could be 'an' (an apple is one apple) and 'an' is found within the answer.
A single letter 'p' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for pan that I've seen before include "search for gold and > god" , "Slate - cooking vessel" , "Cooking vessel; forest god" , "Greek god of the mountains" , "Swing" .)

I've seen this clue in the Evening Standard.
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