Home, having a blow-out (4)

I believe the answer is:

flat

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'home' is the definition.
(flat is a type of home or residence)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for flat that I've seen before include "razed to the ground, having had blow-out" , "Punctured tyre" , "Digs perhaps" , "Level; dull" , "Apartment; even" .)

I've seen this clue in the Evening Standard.

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