Possible Clues:

• Criminal on the high seas
• If he loses his head he gets angry
• A man with taking ways in the main
• Plagiarize
• Sound soft enough to make one cross on the sea
• One sailing under a skull and crossbones
• Quietly I scold Rover
• Might his hair have been coarse, by the sound of it?
• Teach, for one
• Hook, e.g.