Possible Clues:

• Forcefully assertive standing committee doesn't hold onto sentiment
• Opinionated
• Inclined to assertion; overbearing
• Assertive setter with degree needing endless credit
• Assertive parent separating a pet and its parasite briefly?
• Stating opinions forcefully and arrogantly
• Opinionated beast -- dull and in charge
• I'd tog Mac out to be overbearing