The most common and most likely answer to this crossword clue is the 6 letter word ACUMEN
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More clues leading to the result ACUMEN
- Insight shown by a group of Christian fellows
- Sharpness of people supporting a copper
- Last word about copper’s insight
- The last word about sources of Cambridge undergrads' discernment
- University in peak position: new perception
- Letter about returning to Jenny oddly lacking insight
- American largely ignored by people showing judgement
- Last word about copper’s penetration
- I agree to receive copper’s insight
- One letter with another producing insight?
Buddy explains!

The straight part
We know that "Keen insight" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case keen insight = acumen.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does ACUMEN mean?
ACUMEN noun- Quickness of perception or discernment; penetration of mind; the faculty of nice discrimination.
- A sharp, tapering point extending from a plant.
- A bony, often sharp, protuberance, especially that of the ischium.