Related Clues:

• Expertise
• Skill
• Command
• Domination
• Consummate skill
• Prowess
• Supremacy
• Trainee's aim
• Being bossy, perhaps, gives one command of the subject
• A flower in my upper hand
• Army set out to gain control
• Control of teacher variable?
• Virtuosity
• Strong grasp
• Contrary girl set out to be in full command