Crossword puzzle clue "if doubled it's ultrasmart"

Here are the possible solutions for if doubled it's ultrasmart clue

Answer
Clue
Relevancy
chi
Clue
If doubled, it's ultrasmart
Definition
the twenty-second letter of the Greek alphabet, also KHI
ack
Clue
When doubled, defensive fire
When doubled, antiaircraft fire
aku
Clue
When doubled, a Thor Heyerdahl title
allo
Clue
When doubled, popular 1980s-'90s British sitcom
are
Clue
Is doubled?
Is doubled
Definition
a unit of metric land measure
arewe
Clue
Am I, doubled

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