Johnson's initial muddling apt, one's weakened growth adversely affecting house prices? (8)
'weakened growth adversely affecting house prices?' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'johnson's initial muddling apt one's' is the wordplay.
I cannot quite see how this works, but
'one' could be 'ane' ('ane' can be a synonym of 'one') and 'ane' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
'johnson's' is the definition.
Both the definition and answer are singular nouns.
Maybe there's a link between them I don't understand?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for japanese that I've seen before include "Far easterner(s)" , "This nationality apes Jean" , "From Honshu, perhaps" , "Shinto their religion" , "national" .)