Crossword Genius

Practice that keeps one going to matches? (5)

Ross

I believe the answer is:

arson

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

'practice that keeps one going to matches?' is the definition.
The definition and answer can be both acts as well as being singular nouns.
I also know that 'matches' relates to this answer.

'going to matches?' is the wordplay.
'going' becomes 'on' (both can mean functioning or activated).
'to' is a charade indicator (letters next to each other) (I've seen this in other clues).
'matches?' becomes 'ars' (I am not sure about this - if you are sure you should believe this answer much more).
'on' after 'ars' is 'ARSON'.

Can you help me to learn more?

(Other definitions for arson that I've seen before include "Pyromaniac's crime" , "matchplay, say?" , "Iniquitous behaviour" , "Crime involving fire" , "It may get you in court" .)

I've seen this clue in The Sun.
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