Possibly reddens the china (7)
I believe the answer is:
dresden
'china' is the definition.
(a type of porcelain)
'possibly reddens' is the wordplay.
'possibly' is an anagram indicator.
'reddens' anagrammed gives 'DRESDEN'.
'the' acts as a link.
(Other definitions for dresden that I've seen before include "source of 26 [CHINA]" , "Type of china" , "Send Red out to the German city" , "Industrial city" , "German city known for its china" .)