One needs sound glue to make a house (5)

I believe the answer is:

igloo

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'house' is the definition.
(I've seen this before)

I don't understand the remainder of the clue.

(Other definitions for igloo that I've seen before include "Inuit ice house" , "Inuit dwelling" , "series of chilly blocks" , "northern home" , "Hut built of snow" .)

I've seen this clue in the Evening Standard.

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