Old, perhaps, but still capable of making scores (6)
I believe the answer is:
eighty
'scores' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for eighty that I've seen before include "Several score" , "22 [FOUR] scores" , "'Nineteen -- Four' (novel)" , "Northern county (abbr.)" , "Cardinal" .)