Related Clues:

• Slip into the crowd
• Regression
• Go out, like the tide
• Drift gently
• Outward tidal flow
• Companion of flow
• Combine, as traffic lanes
• Float gently in the air
• Go out, in a way
• Drift, as an aroma
• Do a triathlon leg
• Draw away from shore
• Float in the air
• Combine, traffic-wise
• Travel in trunks?