No. The antonym for 'not clear' is clear. (Antonym means the opposite.)
An antonym for clear is blurry.
No. Doubt is the antonym of confidence.
Unclear is an antonym of clear that rhymes.
is your face!
doubt
doubt
Unquestionable or without doubt; contrast or antonym
distrust, doubt
Doubt.
Doubt, confused, worried
unconfidence, uncertainty, doubt
equivocal, vague