Answer: clouds

AnswerCrossword Clue
CLOUDSThey keep people off beaches
cloudsCLOUD, to make obscure (indistinct)
cloudsaggregation of usually obscuring matter especially in interstellar space
cloudsaggregate of charged particles (as electrons)
cloudsusually visible mass of minute particles suspended in the air or a gas
cloudsgreat crowd or multitude swarm clouds of mosquitoes
cloudsa visible mass of particles of condensed vapor (as water or ice) suspended in the atmosphere of a planet (as the earth) or moon
cloudsdark or opaque vein or spot (as in marble or a precious stone)
cloudslight filmy, puffy, or billowy mass seeming to float in the air a cloud of blond hair a ship under a cloud of sail
CLOUDSCumulus and cirrus
CLOUDSThey may rain on your parade
CLOUDSWater droplets aloft
CLOUDSThey rain on your parade
CLOUDSSymbols of impending trouble
CLOUDSPlanes may bisect them
CLOUDSObscures
CLOUDSSilver-lining items
CLOUDSCumuli.
CLOUDSMare's-tails.
CLOUDSCirrus, nimbus, cumulus, etc.
CLOUDSRain makers.
CLOUDSClear sky's lack
CLOUDSSky sights
CLOUDSSun blockers
CLOUDSStorm warnings
CLOUDSRain omens
CLOUDS"Ice cream castles in the air," in a Mitchell song