Possible Clues:

• This joins one in the tunes
• Joins together as one
• How one gets the joint in suet and gets it together
• How you get upset in as one
• One is as one in suet
• Weds
• Tie it in with the sun; that makes it as one
• How one joins with you, Sirs, for chess, by the sound of it
• Works together
• Joins as one