Clue: Super-rare occurrence

Answer: MOON

Length: 4

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Similar Clues:

• Words suggesting a rare occurrence (IFEVER with 6 letters)
• Rare birth occurrence (OCTUPLET with 8 letters)
• Rare occurrence at the U.S. Open on Father's Day that's a common occurrence at the U.S. Open on Labor Day (ACE with 3 letters)
• With hope of a rare occurrence (ONTHEOFFCHANCE with 14 letters)
• "Who Wants to Be a Superhero?" host (STANLEE with 7 letters)
• Quit before becoming superannuated (RETIRE with 6 letters)
• Johnson who invented the Super Soaker (LONNIE with 6 letters)
• Pop's partner at the supermarket (MOMONABUDGET with 12 letters)
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• "y" ending, in superlative form (IEST with 4 letters)