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"comprehension" is also used as a crossword clue. If that's what you saw, the answer is often understanding (13 letters).
Definitions
an ability to understand the meaning or importance of something (or the knowledge acquired as a result)
Word origin
Borrowed from Middle French compréhension, from Latin comprehēnsiō (“taking together”), from com- (“with, together”) + prehendō (“take”).
Used in a sentence
“Students will be tested on their comprehension of sentences in the foreign language.”
“What appeal to him are the broad visions, the specious comprehension of the social order as a whole which a planned system promises.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Grasp of meaning”13 letters
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