Foggy (5)
I believe the answer is:
misty
'foggy' is the definition.
(I know that foggy can be written as misty)
This is all the clue.
(Other definitions for misty that I've seen before include "unclear" , "Indistinct in outline" , "Cloudy, foggy" , "It's not clear" , "Clouded, blurred" .)