Revolutionary countries endlessly paranoid (8)
I believe the answer is:
neurotic
'paranoid' is the definition.
(I've seen this before)
'revolutionary countries endlessly' is the wordplay.
'revolutionary' indicates anagramming the letters.
'endlessly' means to remove the last letter.
'countries' with its final letter taken away is 'countrie'.
'countrie' anagrammed gives 'NEUROTIC'.
(Other definitions for neurotic that I've seen before include "Over-anxious" , "Very nervy" , "Abnormally obsessive" , "Paranoid" , "obsessive character" .)