Clear setter's implicit meaning (8)
I believe the answer is:
overtone
'implicit meaning' is the definition.
'overtone' can be an answer for 'meaning' (overtone is a kind of meaning). I am unsure of the 'implicit' bit.
'clear setter's' is the wordplay.
'clear' becomes 'overt' (both can mean apparent or obvious).
'setter' becomes 'one' ('one' can humorously mean oneself).
'overt'+'one'='OVERTONE'
Can you help me to learn more?
(Other definitions for overtone that I've seen before include "hidden meaning" , "Nuance" , "part of harmonic series" , "Association" , "Subtle extra meaning" .)