Crossword Genius

Building's correct temperature unknown (8)

Ross

I believe the answer is:

property

'building's' is the definition.
(property can mean a building or residence)

'correct temperature unknown' is the wordplay.
'correct' becomes 'proper' (similar in meaning).
'temperature' becomes 't' (abbreviation).
'unknown' becomes 'y' (algebra).
'proper'+'t'+'y'='PROPERTY'

(Other definitions for property that I've seen before include "Buildings" , "Quality; building" , "Attribute; chattel" , "Belongings" , "Possessions; characteristic" .)

I've seen this clue in The Telegraph.
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