Crossword Genius

Ready for sleep, having eaten heartily (6,2)

Ross

I believe the answer is:

tucked in

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

'ready for sleep' is the definition.
(I've seen this in another clue)

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for tucked in that I've seen before include "Ate" , "in bed" .)

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