Example: A clear and present danger.
A clear explanation.
A clear case of murder.
A clear indication that she was angry.
Gave us a clear idea of human nature.
Full extent; distance between extreme limits; especially; the distance between the nearest surfaces of two bodies, or the space between walls; as, a room ten feet square in the clear.(noun)
source: webster1913
adverb (r)
completely(adv.all)
Example: Read the book clear to the end.
Slept clear through the night.
There were open fields clear to the horizon.
source: wordnet30
in an easily perceptible manner(adv.all)
Example: Could be seen clearly under the microscope.
She cried loud and clear.