Nationalist father getting twitch about commotion (9)
I believe the answer is:
patriotic
'nationalist' is the definition.
Both the definition and answer are adjectives. Maybe there's a link between them I don't understand?
'father getting twitch about commotion' is the wordplay.
'father' becomes 'pa' (pa can mean dad or father).
'getting' means one lot of letters go next to another.
'twitch' becomes 'tic' (tic is a kind of twitch).
'about commotion' becomes 'trio' (I can't explain this - if you can you should believe this answer much more).
'tic' after 'trio' is 'triotic'.
'pa'+'triotic'='PATRIOTIC'
Can you help me to learn more?
(Other definitions for patriotic that I've seen before include "Supporting the state" , "Having love for one's country" , "flag-waving?" , "Loyal" , "Devoted to one's country" .)