Underbracing a whole environment

I had this idea of setting up an "aligned" environment
and then having an underbrace with a comment under
it. However, i can't simply go

....
\end{aligned} _underbrace{clever comment}

because that places the brace to the right of the
environment. Is it doable with reasonable number of
lines of code or does it require one to sacrify a
lifetime of hard work?

--

Vänligen
Konrad
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Sleep - thing used by ineffective people
as a substitute for coffee

Ambition - a poor excuse for not having
enough sense to be lazy

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