Hustlers showing no mercy (8)
I believe the answer is:
ruthless
'showing no mercy' is the definition.
(I've seen this in another clue)
'hustlers' is the wordplay.
'hustlers' can be anagrammed to 'RUTHLESS'.
Though, I am not sure how this is indicated.
Can you help me to learn more?
(Other definitions for ruthless that I've seen before include "Showing no mercy" , "Hard-hearted" , "Callous" , "Harsh" , "Hustlers can be without mercy" .)