Possible Clues:

• Blend together
• It may be needed after an entrance
• Join lanes
• Join the 19 Down
• Combine to form a single entity
• It's me taking in a little work to become one
• Make one pond holding gallons
• Gee, that's in some mere get-together!
• It takes little energy in me so to come to get her, perhaps
• Combine, coalesce