Garment right that covers born criminal (6)
I believe the answer is:
robber
'criminal' is the definition.
(I know that criminal can be written as robber)
'garment right that covers born' is the wordplay.
'garment' becomes 'robe' (robe is a type of garment).
'right' becomes 'r' (common abbreviation).
'that covers' indicates putting letters inside.
'born' becomes 'b' (abbreviation next to the year of someone's birth).
'robe'+'r'='rober'
'rober' going around 'b' is 'ROBBER'.
(Other definitions for robber that I've seen before include "Highwayman, for example" , "Violent thief" , "One who thieves" , "Mugger" , "Property stealer" .)