23/22 across
What
disturbs
us
–
a
mercurial
US
‘emperor’
(6,8)
What disturbs us – a mercurial US ‘emperor’ (6,8)
hints
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checks
0
hints
The definition is at the end of the clue.
How the clue works
Here, emperor is the definition — the famous Roman ruler. The phrase "us a mercurial US" gets jumbled up (signalled by "disturbs") to give you all fourteen letters of the answer.