Upper-class housing expert with millions - it's a doddle! (2,7)
I believe the answer is:
no problem
'a doddle' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.
'upper-class housing expert with millions' is the wordplay.
'upper-class' becomes 'noble' (associated in meaning).
'housing' is an insertion indicator.
'expert' becomes 'pro' (short for professional).
'with' says to put letters next to each other.
'millions' becomes 'm' (abbreviation).
'noble' placed around 'pro' is 'noproble'.
'noproble'+'m'='NO PROBLEM'
'it's' is the link.
Can you help me to learn more?
(Other definitions for no problem that I've seen before include "of course" , "fine" , "Easy peasy!" , "Don't worry about it!" .)