Possible Clues:

• Anon
• After a while
• Before long
• Eventually
• Buy this, it sounds, at the double later
• 'Shortly purchase this at the double, by the sound of it (2,3,2)'
• In a short time (3 words)
• Shop till you drop? Said to be soon!
• Presently
• By way of 32 across, but not now