18 across
III
wrong?
Alternatively,
I
or
II
divided
by
the
number
(5)
III wrong? Alternatively, I or II divided by the number (5)
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
Here, number means something that numbs — an anaesthetic. "I or II" hints at ER (Elizabeth Regina), and that ER is split around THE (sitting right there in the clue), so you get E, then TH, then ER, spelling out the answer.