Possible Clues:

• Make a bid for them if they're not at the bottom
• Not behind them may the hand be 10 across in them
• Bridge declaration that doesn't name a particular suit
• Bid them not to be on the bottom
• The bid is not with the bottom of them
• Bridge call
• Not the back sides of the bid
• What bottomless hands may be played in
• It isn't the back sides that get bid for the bridge
• 'They aren't the back side of the bid (2,6)'