The Clue
Ultraviolet filter (5 letter answer)
The Answer
OZONE
Tags
Notes
The answer OZONE is seen frequently, appearing about once every 180 puzzles.
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A high flier may fly in it
Definition
OZONE as a noun:
1. a colorless gas (O3) soluble in alkalis and cold water; a strong oxidizing agent; can be produced by electric discharge in oxygen or by the action of ultraviolet radiation on oxygen in the stratosphere (where it acts as a screen for ultraviolet radiation)