Classless comrade developed twitch (10)
I believe the answer is:
democratic
'classless' is the definition.
('democratic' can be similar in meaning to 'classless')
'comrade developed twitch' is the wordplay.
'developed' is an anagram indicator.
'twitch' becomes 'tic' (tic is a kind of twitch).
'comrade' is an anagram of 'democra'.
'democra'+'tic'='DEMOCRATIC'
(Other definitions for democratic that I've seen before include "Enabling the will of the people" , "Egalitarian" , "23 [JFK] was" , "Popular" , "party in US" .)