China reddens in revolution (7)
I believe the answer is:
dresden
'china' is the definition.
(a type of porcelain)
'reddens in revolution' is the wordplay.
'in revolution' is an anagram indicator.
'reddens' anagrammed gives 'DRESDEN'.
(Other definitions for dresden that I've seen before include "'German city, almost totally destroyed by British air raids in 1945 (7)'" , "German city known for its china" , "that was notoriously fired" , "Send Red out to the German city" , "'German city, noted for china (7)'" .)