Related Clues:

• Union member?
• Just say yes
• Give the OK
• Marital partner
• Business partner, perhaps
• Husband or wife
• Shake on it
• What 'I' and 'am' do
• Side (with)
• Go together well
• Reach an accord
• Please, with 'with'
• Nod in unison
• "Better half," to some
• Feel the same way