Poet dropping right in (4)

I believe the answer is:

home

'in' is the definition.
('he's in' can mean 'he's home')

I can't explain the remainder of the clue.

(Other definitions for home that I've seen before include "domestic" , "Place of origin" , "It's where the heart is, they say" , "It's where the heart is, it's said" , "chez nous?" .)

I've seen this clue in The Guardian.

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