Classes with information on the sound wave detector end in turmoil (6)
I believe the answer is:
genera
'classes' is the definition.
(more than one genus - a class or category)
'wave detector end in turmoil' is the wordplay.
'end' says to take the final letters.
'in' means one lot of letters goes inside another.
'turmoil' becomes 'gena' (I can't explain this - if you can you should give a lot more credence to this answer).
The last letters of 'wave detector' are 'er'.
'er' put inside 'gena' is 'GENERA'.
'with information on the sound' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for genera that I've seen before include "Group of organisms" , "Blood vessel" , "Orders with common characteristics" , "Groups with common characteristics" , "Biological groups" .)