Crossword Genius

Left the thing switched on (3)

Ross

I believe the answer is:

lit

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

'switched on' is the definition.
The definition and answer can be both related to change as well as being past participle verbs.
Perhaps you can see a link between them that I don't see?

'left the thing' is the wordplay.
'left' becomes 'L' (common abbreviation).
'the thing' becomes 'it'.
'l'+'it'='LIT'

Can you help me to learn more?

(Other definitions for lit that I've seen before include "Set afire" , "Set fire to" , "Illuminated" , "books etc?" , "landed here" .)

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