Domineering fellows to inform (7)

I believe the answer is:

bossing

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

'domineering fellows' is the definition.
Although both the answer and definition are present participle verbs, I don't understand how one could define the other.

'to inform' is the wordplay.
'to' becomes 'bos' (I am not sure about this - if you are sure you should believe this answer much more).
'inform' becomes 'sing' (I've seen this in other clues).
'bos'+'sing'='BOSSING'

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.