Scorn island lawyer in Manhattan getting involved in racket (7)
I believe the answer is:
disdain
'scorn' is the definition.
(I know that scorn can be written as disdain)
'island lawyer in manhattan getting involved in racket' is the wordplay.
'island' becomes 'is' (abbreviation).
'lawyer in manhattan' becomes 'DA' (District Attorney, US legal officer).
'getting involved in' means one lot of letters goes inside another.
'racket' becomes 'din' (both can mean a loud noise or disturbance).
'is'+'da'='isda'
'isda' put inside 'din' is 'DISDAIN'.
(Other definitions for disdain that I've seen before include "Scorn - feeling of superiority" , "Haughtiness" , "Hauteur" , "Think (something) unworthy" , "no respect" .)