Crossword Genius

Sadistic alien? (7)

Ross

I believe the answer is:

inhuman

I'm a little stuck... Click here to teach me more about this clue!

This clue could be a double definition.

'sadistic' is the first definition.
(thesaurus)

'alien?' is the second definition.
Both the definition and answer are adjectives. Maybe you can see an association between them that I don't see?

Can you help me to learn more?

(Other definitions for inhuman that I've seen before include "Unfeelingly cruel" , "Pitiless - barbarous" , "Savage, brutal" , "Beastly" , "Without compunction" .)

I've seen this clue in The Telegraph.
Want a hint initially instead of a full solution? Install my app