Crossword puzzle clue "once in a blue moon"

Here are the possible solutions for once in a blue moon clue

Answer
Clue
Relevancy
ina
Clue
Once __ blue moon
Once ___ blue moon
Once -- blue moon
Once ____ blue moon
Once ___ blue moon: 2 wds.
Once ___ blue moon (very rarely): 2 wds.
Once ___ blue moon (rarely): 2 wds.
"Once ___ blue moon."

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