Crossword puzzle clue "declare null"

Here are the possible solutions for declare null clue

Answer
Clue
Relevancy
abrogate
Clue
Declare null
Definition
to repeal (a law, custom, etc.); to abolish authoritatively or formally
repeal
Clue
Declare null and void
Definition
to revoke
aleph
Clue
___ null (set theory concept)
___-null (the number of natural numbers)
___-null (number of positive integers)
___-null (math figure)
Definition
(Hebrew) the first letter of the Hebrew alphabet, also ALEF
chisquare
Clue
Kind of test associated with the null hypothesis
eins
Clue
Almost null?

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