The phrase "a special interest" is correct and commonly used in written English. It can be used to refer to a particular topic or area of focus that someone is particularly interested in. For example: - "He has always had a special interest in astronomy." - "The museum has a special exhibit for those with a special interest in ancient history." - "The politician has been vocal about her special interest in education reform."
Lee took a special interest in Jane.
So the manager took a special interest.
I don't work for a special interest.
But Mr. Lapshyn took a special interest in Muslims.
The Germans have a special interest in Saddam's intentions.
(Mars is a special interest of Mr. Tito's).
Was it a special interest in backcountry skiing?
STEPHANIE GOTO has a special interest in food.
Charlemagne took a special interest in exotic species of animals.
A special interest is devoted to the dynamics of interconversion.
Chief Pfiefer has a special interest in the last issue.
Ludwig does not simply clarify my doubts with English writing, it enlightens my writing with new possibilities
Simone Ivan Conte
Software Engineer at Adobe, UK