Crossword Genius

Fellow bossed everyone at firm - bar a Quebecker? (11)

Ross

I believe the answer is:

francophone

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

'fellow' is the definition.
Both the answer and definition are singular nouns.
Maybe there's a link between them I don't understand?

'bossed everyone at firm bar a quebecker?' is the wordplay.
I cannot quite understand how this works, but
'at' could be 'on' (location) and 'on' is located in the answer.
'firm' could be 'co' (a firm is a company) and 'co' is found within the answer.
'bar' could be 'ph' (abbreviation for Public House) and 'ph' is found in the answer.
'a' could be 'an' and 'an' is found within the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Another definition for francophone that I've seen is " French-speaking".)

I've seen this clue in The Independent.
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