Part of the Tuileries holding the sewers (4)

I believe the answer is:

etui

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'part of the tuileries holding the sewers' is the definition.
I can't tell whether this defines the answer.

'part of the tuileries holding' is the wordplay.
'part of' indicates a hidden word.
'ETUI' is hidden within 'the tuileries holding'.

Can you help me to learn more?

(Other definitions for etui that I've seen before include "a seamstress requires?" , "Small case for small things" , "Case containing sharp objects" , "box" , "Small ornamental needle-case" .)

I've seen this clue in The Globe and Mail.

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