Crossword Genius

Punch landed: so able to be seen by an old nurse? (7)

Ross

I believe the answer is:

lamplit

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

'able to be seen by an old nurse?' is the definition.
I can't tell whether this definition defines the answer.

'punch landed' is the wordplay.
'punch' becomes 'lamp' (I've seen this before).
'landed' becomes 'lit' (I've seen this in other clues).
'lamp'+'lit'='LAMPLIT'

'so' is the link.

Can you help me to learn more?

I've seen this clue in The Times.
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