Gloomy planet in the east? (9)
I believe the answer is:
saturnine
'gloomy' is the definition.
(I've seen this before)
'planet in the east?' is the wordplay.
'planet' becomes 'Saturn' (Saturn is an example).
'the east?' becomes 'E' (synonyms).
'saturn'+'in'+'e'='SATURNINE'
(Other definitions for saturnine that I've seen before include "dour" , "Morose looking" , "Turn in sea makes one gloomy" , "may be brooding" , "offering little amusement" .)