That of the crowd at a Lions' match? (4)
I believe the answer is:
roar
'match?' is the definition.
The definition and answer can be both related to natural events as well as being singular nouns.
Perhaps there's an association between them I don't understand?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for roar that I've seen before include "Loud noise of angry bull" , "Make a loud noise" , "Noise of lion" , "Deep loud sound as of lion or bull" , "Bellow, holler" .)