Report healthy weather (4)
I believe the answer is:
hail
'weather' is the definition.
(hail is a kind of weather)
'report healthy' is the wordplay.
'report' shows a homophone (sound like).
'healthy' becomes 'hale' (hale can mean fit and healthy).
'hale' sounds like 'HAIL'.
(Other definitions for hail that I've seen before include "Fall of ice" , "Stones from the sky" , "Shower of ice pellets" , "Falling ice pellets" , "Signal to and summon, say a taxi" .)