Related Clues:

• Knight! Join up
• Sounds as if by night you will be as one
• One starts to be as one
• Make one E as one
• Combine into one
• It's me taking in a little work to become one
• Karl Marx exhortation
• Part of a pinochle round
• Sign of a narrowing path
• Concert given in the sun - it encourages attendance
• Marry a French female without sex appeal
• One gets support from eastern ally
• Combine into one military formation by the end of battle
• Join in the fun? I tend to!
• Make one sir, as Tarzan might be heard to say