ringleader
US
UK ringleader n: figurative (chief troublemaker)
SC 黑帮头目 hēi bāng tóu mù
TC 黑幫頭目
TC 黑幫頭目
SC 魁首 hēi bāng tóu mù，kuí shǒu
The teenage boys followed their ringleader to the park to paint graffiti.
ringleader n: (law: head of crime group)
SC 主谋 zhǔ móu
SC 元凶
The policed hunted the mafia's ringleader.