Related Clues:

• Sequentially
• Get one's ducks in ___
• Get one's ducks in ---
• ''... and pretty maids all in ---''
• One after the other
• Three in ---
• Jibing
• In ___ (aligned)
• On the same wavelength
• Working together
• Queued up
• In ___ (consecutively)
• "... pretty maids all in ___"
• Three-in-___
• "Pretty maids all in ___"