Extremely cocky, continental journalist passed through revolution? (6)
I believe the answer is:
cycled
'passed through revolution?' is the definition.
(as in passing through one cycle of something)
'extremely cocky continental journalist' is the wordplay.
'extremely' suggests removing the centre.
'continental' becomes 'cl' (I can't explain this - if you can you should believe this answer much more).
'journalist' becomes 'ed' (short for editor).
'cocky' with its middle taken out is 'cy'.
'cy'+'cl'+'ed'='CYCLED'
(Other definitions for cycled that I've seen before include "Went round and round - on bike?" , "Went on two wheels" , "Went by bicycle" , "Went by push-bike" , "Pedalled" .)