Quiet lie about large house (4)
I believe the answer is:
pile
'large house' is the definition.
(informal term for a large building)
'quiet lie about' is the wordplay.
'quiet' becomes 'p' (music symbol for 'piano').
'about' indicates anagramming the letters.
'lie' is an anagram of 'ile'.
'p'+'ile'='PILE'
(Other definitions for pile that I've seen before include "lot of money" , "Stake" , "Arrange in stacks" , "Nap of a carpet" , "Post" .)