Greet a shower of stones (4)

I believe the answer is:

hail

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'greet' is the definition.
(hailing is a kind of greeting)

I cannot understand how the rest of the clue works.

(Other definitions for hail that I've seen before include "Greet - bad weather" , "Greet; frozen rain" , "Icy precipitation" , "Call for - praise, vociferously" , "Precipitation - old greeting" .)

I've seen this clue in The Daily Express.

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