Works in smells and commercial sounds (3,5)

'commercial sounds' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'works in smells' is the wordplay.
'works' becomes 'ops' (op is short for opus, a work).
'in' means one lot of letters goes inside another.
'smells' becomes 'pongs' (I can't explain this - if you can you should believe this answer much more).
'ops' going within 'pongs' is 'POP SONGS'.

'and' is the link.

Can you help me to learn more?