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"relevance" is also used as a crossword clue. If that's what you saw, the answer is often applicability (13 letters).
Definitions
the relation of something to the matter at hand
Word origin
From relevant + -ance.
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Connection to the issue”9 letters
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