A score of blemishes? (5)
I believe the answer is:
marks
I believe this is a double definition.
'a score' is the first definition.
(I know that score can be written as marks)
'blemishes?' is the second definition.
(I know this)
'of' acts as a link.
(Other definitions for marks that I've seen before include "Symbols" , "Stains" , "Goals" , "Targets" , "Visible impressions" .)