Criminals (6)
'criminals' is the definition.
('crook' can be a synonym of 'criminal')
This is all the clue.
(Other definitions for crooks that I've seen before include "Rustlers" , "taken in hand by bishops" , "More than one criminal" , "at 16 down [MAN UNITED]" , "Criminals and bishops' staves" .)
'criminals' is the definition.
('felon' can be a synonym of 'criminal')
This is the entire clue.
(Other definitions for felons that I've seen before include "Criminals, outlaws" , "Malefactors, criminals" , "Convicted criminals" .)
'criminals' is the definition.
(thief is a kind of criminal)
This is the entire clue.
(Other definitions for thieves that I've seen before include "they whip things" , "People who steal" , "Half-inches" , "Robbers" , "Unit of length" .)