Where to relax, making money with music (4)
I believe the answer is:
lair
'where to relax' is the definition.
The answer is a location as well as being a singular noun. This is suggested by the definition.
'money with music' is the wordplay.
'money' becomes 'l' (L can mean 'pounds').
'with' means one lot of letters go next to another.
'music' becomes 'air' (air is a kind of music).
'l'+'air'='LAIR'
'making' acts as a link.
Can you help me to learn more?
(Other definitions for lair that I've seen before include "Den of a wild animal" , "Wild animal's retreat" , "Wild animals' habitation" , "Rail about wild animal's home" , "office?" .)