Quality of a tow-headed individual (4)
I believe the answer is:
tone
'quality' is the definition.
(I know that quality can be written as tone)
'a tow-headed individual' is the wordplay.
'a tow-headed' becomes 't' (this could be a standard abbreviation I've not previously seen).
'individual' becomes 'one' (an individual is one person).
't'+'one'='TONE'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for tone that I've seen before include "Quality of a musical or vocal sound" , "Note as in voice" , "A pitch of note" , "Shade" , "Sound - style" .)