"a good talent" is correct and usable in written English.
You could use it when describing someone who possess a skill or ability. For example, "John has a good talent for playing the guitar."
I think he's a good talent and I wish him all the best at Newcastle!
"He's not only a good talent, he's a great person, a great citizen.
Chef Sonia Suarez, who was Belles's sous chef at Battersea, gets a little Miro-esque with her swirls and flourishes, and her food lacks salt, but she has a good talent for avoiding the clichéd.
Minaya, who was responsible for the signings of Sammy Sosa, José Reyes and others, has a reputation of being a good talent evaluator, a strength that Fred Wilpon said was a vital need for the Mets.
They have built a successful, thriving program, and because Accorsi has shown he is a good talent evaluator, and Fassel has demonstrated he is a top coach, the only thing that should be able to break down the team in the foreseeable future is if their egos go nuclear.
He abhorred routine academic administration and, while often a good talent-spotter, he found difficulty in sustaining close relationships.
I run Storm with my brother Simon, who is an academic with a photographic memory and a disgustingly good talent for mimicry.
"He's a very good talent who is a current England international and should be one for years to come too.
"He's a very good talent, but he's learning their system a little bit," Florida Atlantic's defensive coordinator, Kurt Van Valkenburgh, said last week.
"He's a pretty good talent evaluator, but he's not so good a G.M".
