Room otherwise includes insect (4)

I believe the answer is:

moth

'insect' is the definition.
(moth is a kind of insect)

'room otherwise includes' is the wordplay.
'includes' indicates a hidden word.
'MOTH' is hidden within 'room otherwise'.

(Other definitions for moth that I've seen before include "Cloth-eating larva" , "Night flier" , "Insect, mainly nocturnal" , "One of 5 [FAIRIES]" , "Shakespearean fairy?" .)

I've seen this clue in The Mirror.

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