The phrase "a vague response" is correct and usable in written English.
It can be used when describing an answer or reply that lacks clarity or specificity.
Example: "When asked about the project's timeline, she gave a vague response that left everyone confused."
Alternatives: "an unclear answer" or "an ambiguous reply."
On Sunday, an aide to Mr. Assad gave a vague response.
For years, I offered a vague response about realizing it when I started taking writing courses in college.
When asked yesterday if he expected Ewing to be a Knick at the start of training camp in October, Layden, the Knicks' general manager, replied with a vague response about his fondness for the club's current roster.
Mr. Garodnick received a vague response from Ms. Handy (who is listed in the last Green Book in a state job) that suggested that the city hoped to provide a "more environmentally friendly version" of the book "in the coming months".
Schmidt gave a vague response: "Because of the way the company works, we'll know.
The senator's initial inquiry was met with a vague response in December, which he has since characterized as "disappointing".
He said he asked one player what he hoped to accomplish, and the player offered only a vague answer in response.
It was a very vague response that didn't address the question.
Asked three times by a Montana Public Radio host if he believes biological species developed through natural selection over time, the Republican repeated a straightforward, if vague, response.
"Prosecuting someone for her vague response to a Facebook message is just the junta's latest outrageous twist of the l��se-majesté law".
When asked what had changed to move the Palestinian leadership to return to direct talks, despite what appeared to be only a vague international response to Palestinian demands for assurances on the talks' goal, he pointed again to the quartet's statement.
