The phrase "astute one" is correct and usable in written English.
It can be used to refer to someone who is perceptive, clever, or insightful, often in a context where their intelligence or shrewdness is being acknowledged.
Example: "In the meeting, she proved to be the astute one, quickly identifying the flaws in the proposal."
Alternatives: "sharp individual" or "clever person".
Lote Tuqiri was a handful, but so was Lewsey, regularly darting at the Aussies early on before his game developed into an astute one of support.
Metalist Kharkiv can take heart from finishing just five points behind Shakhtar last season, and the signing of the midfielder Hernán Fredes from Independiente looks an astute one, but they will surely find, as Metalurh Donetsk did after a bright start last season, that their squad simply isn't big enough to compete.
There are some certainties: Guzmán is not a mobster, he is a businessman – an astute one – dealing in a commodity upon which our societies are as depressingly dependent as they are on oil: cocaine and other hard drugs, including heroin and methamphetamine.
That deal appears to be an astute one.
But What About NFC? Apple has largely chosen to bypass NFC, the longstanding norm, for BLE and the company's "all-in" strategy with BLE may be an astute one.
Though the move was popular at the time, it would prove not to be a financially astute one: by focusing on areas neglected by existing companies, the government was entering into the most expensive and least profitable fields of telecommunication.
The smartest observers quoted in "Star" are weighed down by countless other, less astute ones, who are far more numerous.
Despite all the hype that trades and free-agent signings receive during December, individual signings, even astute ones, usually portend fewer victories than many people expect.
The more astute ones ask why it's not, at least, easier for me because I am British: one of the allies, American in every sense apart from my higher intake of tea and my failure to get to grips with American colloquialisms.
Common Core stands on one astute insight -- that more rigor can also increase engagement even for, or especially for, low-skilled students.
If Wharton had lived to see Gawker, Facebook, Starbucks and eBay and had been a not terribly astute observer, "One Fifth Avenue" might have been right up her alley.
