Miser's lamp broken - might she investigate? (4,6)

I believe the answer is:

miss marple

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

'might she investigate?' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'miser's lamp broken' is the wordplay.
'broken' indicates anagramming the letters.
'misers'+'lamp'='miserslamp'
'miserslamp' with letters rearranged gives 'MISS MARPLE'.

Can you help me to learn more?

(Other definitions for miss marple that I've seen before include "Agatha Christie's detective" , "Agatha Christie detective" .)

I've seen this clue in The Irish Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.