Somewhat inhumane Roman? (4)

I believe the answer is:

nero

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'somewhat inhumane roman?' is the definition.
'Nero' can be an answer for 'roman?' (Roman emperor). I'm not certain of the 'somewhat inhumane' bit.

'somewhat inhumane roman?' is the wordplay.
'somewhat' indicates the answer is hidden within the clue.
'NERO' is hidden within 'inhumane roman'.

Can you help me to learn more?

(Other definitions for nero that I've seen before include "Roman arsonist and fiddler" , "He's reputed to have fiddled while Rome burned" , "Roman 9" , "Ruler" , "Famous fiddler" .)

I've seen this clue in The Telegraph.

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