Related Clues:

• Like some tracks and talkers
• Lively, especially for one's age
• "Spartacus" author
• Wasting no time
• Quick on the uptake
• One way to protest
• Ritual abstinence
• Like gymnasts
• Expeditious
• Cut calories completely
• "Spartacus" author Howard
• Feeling one's oats
• Like a good gymnast
• In quick succession
• Gazellelike