Quality wood needing to be delivered (6)
I believe the answer is:
timbre
'quality' is the definition.
(synonyms)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for timbre that I've seen before include "The distinctive property of a voice" , "Sound's character" , "Quality of sound of the voice" , "Character (of sound)" , "Characteristic voice sound" .)