Related Clues:

• Cops out
• Commits a faux pas at the bridge table
• Goes back
• Doesn't follow through
• Doesn't properly follow through
• Goes back on
• Plays the wrong suit
• Heart failures?
• Goes back (on)
• Commits an act of betrayal, maybe
• Breaks a promise
• Weasels out
• Fails to fulfil a promise or obligation
• Goes back on this for green E's
• Doesn't come through