The phrase "a keen ability" is correct and usable in written English.
You can use it to describe someone who has a strong or sharp skill in a particular area.
Example: "She has a keen ability to analyze complex data and draw insightful conclusions."
Alternatives: "a strong talent" or "a sharp skill".
Running it is a job that requires a keen ability to navigate turf battles.
"She also developed a keen ability to edit pictures into narrative sequences and was deft with type," Ms. Ellis continued.
Politics may have been a failed venture for Ms. Whitman, but it has given her a thick skin and a keen ability to address questions directly.
In Africa, early in human evolution, those with a keen ability to spot the creatures outlived their less wary counterparts, according to The Sunday Times.
My closest neighbor, Red, is an ex-Marine with a good view into our backyard and a keen ability to discover all the necessary information on our block at any given time.
He answered that longevity and close proximity to nature had also bred a keen ability to cope with disaster — the shrine had managed to survive precisely because it had learned to adapt — but that the scales were tipping.
Second, the nostril is much expanded compared with other groups of sharks and may provide hammerhead sharks with a keener ability to locate prey and follow scents to their sources.
The show will reportedly rely a lot on her keen ability to find the funny side of life's absurdities.
If we have chosen you as a partner, or even a dear friend, we may see either a situation that requires our keen ability to pick up the mess, or we may see someone who can love us back to health.
Bernd Heinrich, a professor emeritus at the University of Vermont known for his books on raven behavior, suggested that crows' apparent ability to distinguish among human faces is a "byproduct of their acuity," an outgrowth of their unusually keen ability to recognize one another, even after many months of separation.
Debbage comments, "One strength of Bradley Joseph as an artist has been his keen ability to write inspiring music with appropriately titled songs that express that thought non-verbally".
