Crossword Puzzle Corporation boss

Clue: Corporation boss

Remorseless bosses (OGRES with 5 letters)
Union boss who went missing (HOFFA with 5 letters)
Message from the boss, maybe (MEMO with 4 letters)
Be a boss (OVERSEE with 7 letters)
The Boss's backers (ESTREETBAND with 11 letters)
Upon reviewing the apprentice's work, the boss said, "Truly you are a __" (TAILORSDUMMY with 12 letters)
Underworld boss (e.g. CAPO with 4 letters)
He bosses the Pres. (CEO with 3 letters)
Notorious '80s-'90s crime boss (GOTTI with 5 letters)
Be bossy (e.g. RUNTHESHOW with 10 letters)