Heap of carpets (4)

I believe the answer is:

pile

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This might be a double definition.

'heap' is the first definition.
(synonyms)

'of carpets' is the second definition.
The definition suggests a singular noun which matches the answer.

Can you help me to learn more?

(Other definitions for pile that I've seen before include "Stake" , "lot of money" , "Part of reactor" , "Fortune" , "A heap or stack" .)

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

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