Fashion house, we hear? (6)
I believe the answer is:
Here is my best explanation:
'fashion' is the definition.
('manner' can be a synonym of 'fashion')
'house we hear?' is the wordplay.
'house' becomes 'manor' (manor house is a kind of house).
'we hear?' shows a homophone (sound like).
'manor' is a homophone of 'MANNER'.