Crossword Genius

Wrong lighting wasting vicar's power (5)

Ross

I believe the answer is:

arson

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

This clue might be a double definition.

'wrong lighting wasting' is the first definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'vicar's power' is the second definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.

Can you help me to learn more?

(Other definitions for arson that I've seen before include "Malicious crime" , "Sonar (anag.)" , "Be pettish" , "criminal fire-raising" , "Malicious fire-lighting" .)

I've seen this clue in The Independent.
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