No taser involved in crime (7)
I believe the answer is:
treason
'crime' is the definition.
(treason is a kind of crime)
'no taser involved' is the wordplay.
'involved' indicates anagramming the letters (involved can mean confusing or complex).
'no'+'taser'='notaser'
'notaser' is an anagram of 'TREASON'.
'in' acts as a link.
(Other definitions for treason that I've seen before include "Perfidy" , "Serious crime" , "LEse-majestE" , "One's art? (anag)" , "Crime agains one's country" .)