Crossword Genius

Divvy once again on X, perhaps working on riot (11)

Ross

I believe the answer is:

reapportion

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

'divvy once again' is the definition.
I can't judge whether this definition defines the answer.

'on x perhaps working on riot' is the wordplay.
'on' becomes 're' ('on' can be mean 'with reference to').
'x perhaps' becomes 'app' (I can't justify this - if you can you should believe this answer much more).
'working' indicates an anagram.
'on'+'riot'='onriot'
'onriot' with letters rearranged gives 'ortion'.
're'+'app'+'ortion'='REAPPORTION'

Can you help me to learn more?

I've seen this clue in The Independent.
Want a hint initially instead of a full solution? Install my app