Kind of high point in Scots singing that's regularly lacking (6)
I believe the answer is:
benign
'kind of high' is the definition.
'benign' can be an answer for 'kind' (I've seen this before). I'm not sure about the 'of high' bit.
'point in scots singing that's regularly lacking' is the wordplay.
'point in scots' becomes 'ben' (I can't justify this - if you can you should believe this answer much more).
'that's regularly lacking' means one should take alternating letters.
The alternating letters of 'singing' are 'ign'.
'ben'+'ign'='BENIGN'
Can you help me to learn more?
(Other definitions for benign that I've seen before include "Kindly, pleasant" , "Kindly or not malignant" , "Favourable" , "Genial, kindly" , "Harmless or kind" .)