27 across
Most
useless
papers
in
case
(6)
Most useless papers in case (6)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
See most useless there — that's your definition. For the wordplay, "papers" gives you ID (as in identity documents), and then you tack on LEST, which means "in case" — stick ID and LEST together and you're there.