Possible Clues:

• Nice bit of fluff? Don't whistle, that's rude!
• Light fluff of some seeds
• The urban area here contains light Scottish flora
• It could be floating in the wind, lost
• Feathery seeds entangled with old nest
• Airborne seeds
• Airborne seeds — the one here was the first found in urban area
• Feathery seeds beginning to twirl unexpectedly in the wolds
• Transporter of seeds was first in the conurbation here
• Feathery stuff from a plant, lots the wind scattered