Mad-ox said:He wasn’t taken aback by her out of a clear sky question.
out of a clear sky=out of the blue=unexpectedly
As an NES but not a teacher, I have never come across "out of a clear sky".
The standard BrE expression is, as you mention, "out of the blue".
Regards
R21
Does my sentence make sense? He wasn’t taken aback by her out of the blue question.
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