Outspoken music producer is transparent has-been? (7)
I believe the answer is:
spectre
'outspoken music' is the definition.
The answer and definition can be both related to thinking as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for spectre that I've seen before include "Sceptre (anag.)" , "Ghost, phantom, apparition" , "after-image?" , "'Phantom, shade (7)'" , "Wraith" .)