Assassin (4)
'assassin' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for hit man that I've seen before include "In slang, a hired assassin" , "A modern hired assassin" , "Hired gun" , "Hired murderer" , "He's a professional killer" .)
'assassin' is the definition.
(hired killer)
This is all the clue.
(Other definitions for killer that I've seen before include "Extremely impressive" , "One causes the death of another" , "Hilarious joke" , "Murderer and bees" , "One murdering" .)
'assassin' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for thug that I've seen before include "Violent ruffian" , "Burrowing crustacean" , "Violent hoodlum" , "A vicious or brutal ruffian" , "violent gang member" .)
'assassin' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for murderer that I've seen before include "hit man" , "Deliberate unlawful killer" , "Serious criminal enters demurrer" , "Assassin" , "One commits homicide" .)