After torrential sleet cloak glass (9)
I believe the answer is:
telescope
'glass' is the definition.
(glass can mean a telescope or eyeglass)
'after torrential sleet cloak' is the wordplay.
'after' is a charade indicator (letters next to each other).
'torrential' indicates an anagram (letters in a storm or torrent).
'cloak' becomes 'cope' (cloak worn by a bishop).
'sleet' with letters rearranged gives 'teles'.
'teles' put next to 'cope' is 'TELESCOPE'.
(Other definitions for telescope that I've seen before include "Instrument for viewing distant objects" , "Shrink - optical instrument" , "contract" , "Magnifier of distant images" , "It magnifies the image of distant objects" .)