Involved in anarchism, need lingo of Communists (8,7)
I believe the answer is:
mandarin chinese
'lingo of communists' is the definition.
'involved in anarchism need' is the wordplay.
'involved' indicates anagramming the letters (involved can mean confusing or complex).
'in'+'anarchism'+'need'='inanarchismneed'
'inanarchismneed' with letters rearranged gives 'MANDARIN CHINESE'.
(Other definitions for mandarin chinese that I've seen before include "Such languauge" , "World's most spoken language" .)