Crossword Genius

Forward commercial proprietor is gloomy (2,1,6)

Ross

I believe the answer is:

on a downer

I'm a little stuck... Click here to teach me more about this clue!

'gloomy' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'forward commercial proprietor' is the wordplay.
'forward' becomes 'on'.
'commercial' becomes 'ad' (abbreviation for advertisement).
'proprietor' becomes 'owner' (synonyms).
'on'+'ad'+'owner'='ON A DOWNER'

'is' acts as a link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.
Want a hint initially instead of a full solution? Install my app