Get taxi in bad weather (4)

I believe the answer is:

hail

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'bad weather' is the definition.
(hail is a type of bad weather)

I can't explain the rest of the clue.

(Other definitions for hail that I've seen before include "Welcome - cold shower" , "Frozen rain or Roman greeting" , "Icy precipitation" , "Call for - praise, vociferously" , "Greet - bad weather" .)

I've seen this clue in The Irish Times.

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