Like areas around waterfalls (5)
I believe the answer is:
misty
'like areas around waterfalls' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for misty that I've seen before include "Old number" , "Cloudy, foggy" , "Indistinct; slightly foggy" , "Slightly fogged" , "Hazy" .)