Slow scoring rate? (5)
I believe the answer is:
lento
'slow' is the definition.
(similar in meaning)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for lento that I've seen before include "It's slower than adagio" , "Instruction to players" , "Slow (mus.)" , "Old sayings" , "Musically low speed" .)