Shows notes to old Scots (7)
I believe the answer is:
depicts
'shows' is the definition.
('depict' can be a synonym of 'show')
'notes to old scots' is the wordplay.
'notes' becomes 'de' (two musical notes).
'to old scots' becomes 'picts' (I can't justify this - if you can you should give a lot more credence to this answer).
'de'+'picts'='DEPICTS'
Can you help me to learn more?
(Other definitions for depicts that I've seen before include "Describes or shows as picture" , "outlines" , "Paints or draws something" .)