Nominally the person to sort out a riot? (7)

I believe the answer is:

janitor

I'm a little stuck... Click here to teach me more about this clue!

'nominally the person' is the definition.
I can't tell whether this definition defines the answer.

'sort out a riot?' is the wordplay.
'sort' becomes 'jan' (I am not sure about this - if you are sure you should believe this answer much more).
'out' indicates anagramming the letters.
'riot' with letters rearranged gives 'itor'.
'jan'+'itor'='JANITOR'

'to' is the link.

Can you help me to learn more?

(Other definitions for janitor that I've seen before include "(In Scotland) school caretaker" , "Caretaker (mainly US)" , "Person looking after building" , "Caretaker or doorkeeper" , "One employed to clean and maintain a building" .)

I've seen this clue in the Evening Standard.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.