Dishonorable sort (3)
I believe the answer is:
cad
'dishonorable sort' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for cad that I've seen before include "Ungentlemanly person" , "A rotten chap, no integrity" , "Wretch" , "One behaves dishonourably" , "A knave, real rotter" .)