Sort of sound a dry speaker cant use? (6)
I believe the answer is:
liquid
'sort of sound' is the definition.
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for liquid that I've seen before include "Non-gaseous fluid" , "Sloppy" , "Melted" , "Neither gas nor solid" , "substance in a fluid state" .)