Features (5)
'features' is the definition.
(aspect is a kind of feature)
This is the entire clue.
(Other definitions for aspects that I've seen before include "Elements; views" , "Ways of considering a matter" , "Features (of a problem)" , "Appearances presented by saps etc." , "Looks or appearances" .)
(Other definitions for marks that I've seen before include "Visible signs" , "Grades assigned to school work" , "Former German currency" , "points" , "See 8" .)