Crossword Genius

Little boy's room (3)


I believe the answer is:


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Here is my best explanation:

This clue could be a double definition.

'little boy's' is the first definition.
'Den' can be an answer for 'boy's'. I am not certain of the 'little' bit.

'room' is the second definition.
(den is a kind of room)

Can you help me to learn more?