One wound up in the Tower, perhaps (6,9)

I believe the answer is:

spiral staircase

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This might be a double definition.

'one wound up in' is the first definition.
The definition suggests a singular noun which matches the answer.

'tower perhaps' is the second definition.
The definition suggests a singular noun which matches the answer.

'the' acts as a link.

Can you help me to learn more?

(Another definition for spiral staircase that I've seen is " Not a direct flight".)

I've seen this clue in The Times.

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