'Not feeling clever' - how far does this extend?

The other day, when my wife was unwell, I happened to mention to a relative in Norfolk that she wasn't 'feeling too clever'. He instantly knew what I meant.

But it made me wonder how far this idiom extends. I'm sure I have heard it used in other parts of Britain, but is it universal throughout the Anglosphere?

Solution 1:

It's certainly still used here near Manchester (but less than was once the case).

Oxford Dictionaries give the sense, labelling it as an informal British usage:

clever 2 [PREDICATIVE, WITH NEGATIVE] British informal

Healthy or well:

I was up and about by this time though still not too clever.