Lunatic orating about year for revolution (8)
I believe the answer is:
'revolution' is the definition.
(I've seen this before)
'lunatic orating about year' is the wordplay.
'lunatic' is an anagram indicator.
'about' indicates putting letters inside.
'year' becomes 'y'.
'orating' anagrammed gives 'gration'.
'gration' going around 'y' is 'GYRATION'.
'for' is the link.
(Other definitions for gyration that I've seen before include "Spin" , "Going round" , "Tory gain (anag) - revolution" , "Circular motion" , "action of twisters" .)