Possible Clues:

• Sudden hurried movement of cattle
• Charge marked on drug
• A frightful flight for 4 across
• Like Pink Floyd's side of the moon
• Wild rush
• Put one's foot down with some energy, and run
• Not the sort of run for 11 across, if you put your foot down first
• Begin to put your foot down in a runway way
• Stock running out?
• Running out of stock altogether