Scotsman going to his doctor is just showing off (8)
I believe the answer is:
machismo
'scotsman going to his doctor is just showing off' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'scotsman going to his doctor' is the wordplay.
'scotsman' becomes 'mac'.
'going to' means one lot of letters go next to another.
'doctor' becomes 'mo' (medical officer).
'mac'+'his'+'mo'='MACHISMO'
Can you help me to learn more?
(Other definitions for machismo that I've seen before include "Aggressive masculine pride" , "Exaggerated sense of manliness" , "show of masculinity" , "Aggressive virility" , "Exaggerated masculine pride" .)