(someone) have not a clue

Translations
(кто-то) не имеет ни малейшего понятия
He says he has not a clue about what happened.
Он говорит, что не имеет ни малейшего понятия о том, что произошло.
Definitions
This phrase means that someone has no knowledge or understanding about a particular subject or situation; they are completely unaware or ignorant about it.
Words
clue

noun
подсказка
have

verb
иметь
have not

verb
не иметь
not

adverb
не