Right lining for person employing pocket (7)
I believe the answer is:
trouser
'pocket' is the definition.
(both can mean to steal or take)
'right lining for person' is the wordplay.
'right' becomes 'r' (common abbreviation).
'lining' indicates putting letters inside.
'for' becomes 'to' (eg both can mean 'in the opinion of').
'person' becomes 'user' (user is a kind of person).
'r' inserted inside 'to' is 'tro'.
'tro'+'user'='TROUSER'
'employing' acts as a link.
(Other definitions for trouser that I've seen before include "For oneself" , "Pocket (something)" , "Our rest (anag)" , "Appropriate" , "Pocket (slang)" .)