Notice Scots chap is hard to reprimand (8)
I believe the answer is:
admonish
'reprimand' is the definition.
(I've seen this before)
'notice scots chap is hard' is the wordplay.
'notice' becomes 'ad' (both can mean an advertisement).
'scots chap' becomes 'mon' (I can't explain this - if you can you should give a lot more credence to this answer).
'hard' becomes 'h' (abbreviation used in pencil classifications).
'ad'+'mon'+'is'+'h'='ADMONISH'
'to' is the link.
Can you help me to learn more?
(Other definitions for admonish that I've seen before include "Tell off" , "Warn sternly" , "Mildly reprove" , "Chide or reprimand" , "Gently reprove" .)