Make unclear (4)
'make unclear' is the definition.
(synonyms)
This is all the clue.
(Other definitions for obscure that I've seen before include "Dim, indistinct or not well known" , "Puzzling" , "Jude may be" , "Blot out" , "Cloudy or veiled" .)
'make unclear' is the definition.
(synonyms)
This is all the clue.
(Other definitions for blur that I've seen before include "Become unclear" , "Group - thing not clearly seen" , "Make hazy" , "British rock group" , "Confused impression" .)
'make unclear' is the definition.
(clouding is a kind of making unclear)
This is all the clue.
(Other definitions for cloud that I've seen before include "E.g. stratus" , "It hides the sun" , "Become gloomy" , "Visible mass floating above" , "Source of rain" .)