Man involved in treason (7)
I believe the answer is:
senator
'man' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'involved in treason' is the wordplay.
'involved in' indicates anagramming the letters (involved can mean complex or confusing).
'treason' with letters rearranged gives 'SENATOR'.
Can you help me to learn more?
(Other definitions for senator that I've seen before include "Member of government" , "Member of the Second House" , "Legislator -- treason (anag)" , "Legislative body member" , "US representative" .)