Wicked hustlers showing no mercy (8)

I believe the answer is:

ruthless

'showing no mercy' is the definition.
(I've seen this before)

'wicked hustlers' is the wordplay.
'wicked' indicates an anagram.
'hustlers' anagrammed gives 'RUTHLESS'.

(Other definitions for ruthless that I've seen before include "Showing no compassion" , "Hard-hearted" , "Hustlers can be without mercy" , "nasty" , "Unsparing" .)

I've seen this clue in The Telegraph.

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