Crossword Genius

Left large hint, puzzled? The light may dawn on one! (3-7)

Ross

I believe the answer is:

all-nighter

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

'light may dawn on one' is the definition.
I know nothing about this answer so I can't tell whether this works.

'left large hint puzzled?' is the wordplay.
'left' becomes 'l' (common abbreviation).
'puzzled?' indicates anagramming the letters (I've seen 'puzzled' mean this).
'l'+'large'+'hint'='llargehint'
'llargehint' with letters rearranged gives 'ALL-NIGHTER'.

'the' acts as a link.

Can you help me to learn more?

I've seen this clue in The Times.
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