Dispersed pieces with celerity! (5)
I believe the answer is:
speed
'celerity' is the definition.
(I've seen this in another clue)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for speed that I've seen before include "Rate of travel" , "Hasten" , "A devilish quick driver?" , "Velocity" , "Tempo - drug" .)