Related Clues:

• Energy option
• __ reactor
• Wing adjective
• Of the sun
• Word with age or weight
• Very, very tiny
• Word with particle or pile
• Alternative power
• Word before number or weight
• Teeny-tiny
• Word before panel or plexus
• A type of energy
• Like the Julian calendar
• Alternate form of energy
• Part of 106 Across