From Yank it's a sound prize? (8)
I believe the answer is:
pulitzer
'prize?' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for pulitzer that I've seen before include "US newspaper publisher who instituted prizes for literature, journalism and music" , "US newspaper publisher who established a prestigious prize" , "Prestigious American prize for writing" , "US news publisher" .)