Frank would have a striking effect on the public-address (5)
I believe the answer is:
zappa
'frank' is the definition.
Both the definition and answer are singular nouns.
Perhaps you can see a link between them that I can't see?
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for zappa that I've seen before include "Frank ---, US rock composer" , "Mothers of Invention leader" , "American musician" , "Frank --, US musician" , "Frank --, US guitarist and composer" .)