Related Clues:

• Vow, attest
• Blaspheme after Sunday display
• Three out of four players going to Arkansas state with conviction
• Make a promise
• Sabbath outfit utter oaths
• Promise son clothes
• Cornish listener's curse?
• Keep the censor busy
• Be blasphemous
• Use vulgarities
• Shock the kiddies, perhaps
• React to a hammered thumb
• Say some naughty words
• Show that you're leveling
• Say something bleep-worthy