Related Clues:

• Be the heavy boss
• To be boss is a weighty matter
• Go first, but not in the light of this, it seems
• To have been in charge about a heavy matter
• No light matter to be in command (4)
• A heavy responsibility to have to be in charge
• To be in charge is no light matter
• It's a heavy responsibility to be at the head
• It's no light matter to be out in front
• 'Met Al to be the chief, however heavy (4)'
• Even 21 across might be heavy on this
• It's a weighty matter to be in charge
• Frontrunner's position
• First stone thrower?
• Alchemy material