All in one cooking vessel? (3)
I believe the answer is:
pan
'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" .)