Possible Clues:

• Way to go ... or, as two words, lead-in to 'way to go'
• 'Merrily We Roll ___' (Sondheim musical)
• 'Git ___, little dogie'
• 'Moving right ___ ...'
• Way to sing or tag
• How "I knew it all"?
• A marathon in company with others
• Moving forward
• "Git ___" (words to a 22-Across)
• Jon Butcher Axis "___ the Axis"