Playing speed (5)
I believe the answer is:
tempo
This clue might be a double definition.
'playing' is the first definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'speed' is the second definition.
(I've seen this before)
Can you help me to learn more?
(Other definitions for tempo that I've seen before include "Pace, rate" , "What a metronome provides" , "Rate and rhythm in music" , "Time (music)" , "Speed at which piece of music is played" .)