Foil lining trays too generously (6)

I believe the answer is:

stooge

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

'foil' is the definition.
(I've seen this in another clue)

'lining trays too generously' is the wordplay.
'STOOGE' is hidden in amongst the letters.
But, I'm not sure how this is indicated.

Can you help me to learn more?

(Other definitions for stooge that I've seen before include "Comical straight man" , "A comedian's assistant, butt of his jokes" , "Toes go wrong for the scapegoat" , "Partner who is the butt of comedian's joke" , "lackey" .)

I've seen this clue in The Telegraph.

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