For organ music? (3)
I believe the answer is:
ear
This clue could be a double definition.
'for organ' is the first definition.
(the ear is an organ)
'music?' is the second definition.
The definition and answer can be both related to thinking as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
Can you help me to learn more?
(Other definitions for ear that I've seen before include "Listening organ" , "Part of a cereal plant containing the seeds" , "Corn seed-holder" , "Van Gogh missing body part" , "Listener in the cornfield" .)