Torpedo tubes live in the antechamber (9)

I believe the answer is:

vestibule

I'm a little stuck... Click here to teach me more about this clue!

'the antechamber' is the definition.
(synonyms)

'torpedo tubes live' is the wordplay.
'tubes live' can be anagrammed to 'VESTIBULE'.
But, I'm not sure how this is indicated.

'in' acts as a link.

Can you help me to learn more?

(Other definitions for vestibule that I've seen before include "room" , "part of house" , "reception" , "Entrance hall, porch" , "Entrance hall - foyer" .)

I've seen this clue in the Sydney Morning Herald.

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