The phrase "a postscript to a" is correct and usable in written English.
It can be used when referring to an additional remark or note added after the main content, often to provide further information or clarification.
Example: "In her letter, she included a postscript to a previous discussion about their plans for the weekend."
Alternatives: "an addendum to a" or "a note following a".
It was not so much a postscript to a career as a promise for his future.
In a postscript to a long essay on photography, he recounts a safari during which he snapped a picture of an angry lion.
Mr. Eikenberry's comments, in a postscript to a speech in front of about 200 students and faculty members at Herat University, departed sharply from the normally tolerant public stance that Western diplomats had taken with Mr. Karzai.
The word is used as a postscript to a stupid action or statement; it is probably a bastardisation, of the kind that the internet tends to produce, of "duh".
In "A Postscript to a Sociological Utopian" (1989), he wrote, "In C. Wright Mills I was dealing with a sadly flawed individual, a human being who had biased attitudes on many issues, including minorities, Jews, women, and especially blacks".
Mariyan Ognyanov's 89th-minute goal in the national stadium was well taken, drilled clinically past Petr Cech from a high, bouncing ball down the middle, but was very much a postscript to a Didier Drogba hat-trick.
By the time the book was published, the era it portrayed was nearly over, leading one panelist to call it "a postscript to an amazing era".
A3 Pope Adds Seven Cardinals Pope John Paul II announced seven new cardinals in a postscript to the 37 cardinals, a record, announced a week ago.
In December 2007, one derivatives broker added a postscript to his message to a cash broker: "Bubbly on its way with [Senior Yen Trader]," according to the Commodity Futures Trading Commission.
On Thursday, Triche's nephew had an opportunity to help Syracuse (and his family) add a bit of a postscript to that loss, 26 years later.
