Crossword Genius

Doctor learnt new cure for dimness? (7)

Ross

I believe the answer is:

lantern

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

'cure for dimness?' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?

'doctor learnt new' is the wordplay.
'doctor' indicates anagramming the letters.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'learnt' anagrammed gives 'lanter'.
'lanter'+'n'='LANTERN'

Can you help me to learn more?

(Other definitions for lantern that I've seen before include "It illuminates" , "Portable light source" , "Enclosed lamp" , "Light in a transparent protective case" , "Portable lamp case" .)

I've seen this clue in The Telegraph.
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