Is this your crossword clue?
"irrelevant" is also used as a crossword clue. If that's what you saw, the answer is often extraneous (10 letters).
Definitions
having no bearing on or connection with the subject at issue
Word origin
From ir- + relevant.
Used in a sentence
“His comments were completely irrelevant to the discussion.”
“We need to focus on the main topic and ignore irrelevant details.”
“The fact that she is his sister is irrelevant to the case.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Beside the point”10 letters
Not quite right?
"Search similar patterns."
I_________