The phrase "a sort of silly" is correct and usable in written English.
It can be used to describe something that is somewhat foolish or lacking in seriousness, often in a lighthearted or humorous context.
Example: "The movie was a sort of silly comedy that made everyone laugh despite its ridiculous plot."
Alternatives: "somewhat foolish" or "kind of ridiculous".
"You're making a sort of silly, frothy piece of nonsense, and you're making a sad story underneath.
That's a sort of silly thing to say — it's like saying "I'm going to go to Asia or to North America".
Though his dance card is already incredibly full for a player coming back from injury, the prospect of landing Nadal in his comeback has set off a sort of silly season of speculation, with seemingly every tournament on the A.T.P. circuit engaged in a rendition of "Desperately Seeking Rafa".
I'm not going to pour ice water on my head, or make any sort of silly video.
You buy a car and want to add all sorts of silly aftermarket modifications like it's 2004 and Pimp My Ride is still relevant?
It's an interesting, if sort of silly, excuse.
It is the most anachronistic of the NCAA's boatload of anachronisms, the sporting equivalent of the electoral college, one hot mess of silly, albeit a fun, well-meaning sort of silly.
It was in that madcap period, when the morning show was consistently clever and unpredictable, that Bacon made a name as a roving reporter, asking the sort of silly questions that no one else wanted to ask.
Moral non-objectivism is not the view the wrongness of genocide, say, is just a matter of opinion (in the way that preferring chocolate ice cream over vanilla is a matter of opinion), and an undue focus on that sort of silly subjectivism whether explicitly or tacitly and unthinkingly—has injected a fair degree of straw-mannishness into proceedings.
Yes, that was a slip of the tongue the sort of silly mistake that occasionally creeps into a rushed blog post.
