Wide seat in stalls of auditorium (4)

I believe the answer is:

sofa

'wide seat' is the definition.
(a sofa is a wide or long seat)

'in stalls of auditorium' is the wordplay.
'in' says the answer is hidden in the clue.
'SOFA' is hidden in the letters of 'stalls of auditorium'.

(Other definitions for sofa that I've seen before include "Upholstered seat for two or more" , "Chesterfield, maybe" , "Divan" , "Lounge" , "Item of furniture" .)

I've seen this clue in The Guardian.

Want a hint initially instead of a full solution? Install my app