Times called in bars (5)
I believe the answer is:
tempi
'times' is the definition.
(tempo is a kind of time)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for tempi that I've seen before include "Speed controls" , "Speeds, rhythms of musical pieces" , "Times" , "Speeds (music)" , "Rates" .)