Crossword Genius

Shone light on pool by day (9)

Ross

I believe the answer is:

glimmered

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

'shone' is the definition.
The answer and definition can be both to do with perception as well as being past participle verbs.
Maybe there's a link between them I don't understand?

'light on pool by day' is the wordplay.
'light' becomes 'glim' (I've seen this in another clue).
'on' is a charade indicator (letters next to each other).
'pool' becomes 'mere' (mere can mean a lake).
'by' says to put letters next to each other.
'day' becomes 'd' (abbreviation for day).
'glim'+'mere'+'d'='GLIMMERED'

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.
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