Beginner occupying empty room (4)

I believe the answer is:

tyro

'beginner' is the definition.
(I know that beginner can be written as tyro)

'occupying empty room' is the wordplay.
'occupying' indicates a hidden word (letters for the answer occupy part of the clue).
'TYRO' can be found hidden inside 'empty room'.

(Other definitions for tyro that I've seen before include "'Beginner, novice (4)'" , "Neophyte" , "New" , "Apprentice" , "Spell for rookie" .)

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