Welcome cold shower (4)
I believe the answer is:
hail
I believe this clue is a triple definition!
'welcome' is the first definition.
('hail' is a greeting or welcome)
'cold' is the second definition.
(I've seen this before)
'shower' is the third definition.
(I have seen 'Cold shower' mean 'hail' so perhaps 'shower' could also mean 'hail')
(Other definitions for hail that I've seen before include "a drop of the hard stuff?" , "Stones dropped" , "Frozen rain; call taxi" , "Hard Rain?" , "volley" .)