Possible Clues:

• 1 across turns up to allow for a small quantity
• Thin stream or drop of liquid
• Film following flyer sent up and left to drop
• The bird is up. Allow it to escape a little
• Winger repelled by obstruction a tiny bit
• Gannet possibly rising to allow drop
• Drop from ascending eagle? Not half deadly!
• Very small quantity of a liquid
• A little water fowl repelled by obstruction
• Call time, previously knocking back small amount of liquid