Greeting from heaven? (4)
I believe the answer is:
hail
This might be a double definition.
'greeting' is the first definition.
(hail is a kind of greeting)
'heaven?' is the second definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'from' is the link.
Can you help me to learn more?
(Other definitions for hail that I've seen before include "Fall of ice" , "Signal to and summon, say a taxi" , "cold weather" , "Old Roman salute, or frozen pellets" , "wintry weather" .)