This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A person who leads others, especially in illicit or informal activities.

n. a leader of a group of people, especially an unofficial group

n. a person who starts and leads a disturbance (such as a riot), a conspiracy, or a criminal gang

n. The leader of a circle of dancers; hence, the leader of a number of persons acting together; the leader of a herd of animals.

n. Opprobriously, a leader of a body of men engaged in the violation of law or in an illegal enterprise, as rioters, mutineers, or the like.

n. One who leads a ring, as of dancers; one who opens a ball.

n. Hence The leader or chief in any enterprise; particularly, one who leads and incites others to the violation of the law or the recognized rules of society: as, the ringleader in a riot or a mutiny.

n. a person who leads (especially in illicit activities)

"They will also come into contact with a traveling carnival which also seeks out people with abilities and whose sinister ringleader is played by new cast member Robert Knepper (Prison Break)."

provoker    instigator    instigant    firebrand    inciter   

chief   

instigator    insurrectionist    fraight    rabble-rousing    souereigne    mover    ensigne    leveller    victuall    sower