Crossword Genius

A communication from the spirit world? (4,6)


I believe the answer is:

dead letter

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

'a communication' is the definition.
(dead letter is a kind of communication)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for dead letter that I've seen before include "Itll not lead to prosecution" , "Unresponsive landlord" , "no longer observed" , "Ineffective rule" , "Law no longer enforced" .)

I've seen this clue in the Evening Standard.
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.