Related Clues:

• "In ___ signo vinces" (Constantine's motto)
• Women's ___ movement
• Ad____
• Mad ___ (fill-in-the-blank story)
• Ad ..., for one particular situation only
• Bldg. where much research is done
• Ad- (improvise)
• Ad-__ (wing it)
• Ad add-on?
• Ad or post follower
• Ad follower?
• Ad-___ (go off-script)
• Justin Trudeau's party: Abbr
• Latin word after post or ad
• End of a cause?