Point a lot out, maybe, as sound (5)
I believe the answer is:
tonal
'as sound' is the definition.
Both the answer and definition are adjectives. Perhaps you can see an association between them that I can't see?
'point a lot out' is the wordplay.
'point' becomes 'n' (North).
'lot' becomes 'tol' (I can't justify this - if you can you should believe this answer much more).
'out' means one lot of letters goes inside another.
'n'+'a'='na'
'na' put into 'tol' is 'TONAL'.
'maybe' is the link.
Can you help me to learn more?
(Other definitions for tonal that I've seen before include "Relating to conventional keys and harmonies" , "According to musical key" , "of pitch" , "Relating to music using conventional harmony" , "To do with vocal or musical sound" .)