Gloomy natures in confusion (9)
I believe the answer is:
saturnine
'gloomy' is the definition.
(I've seen this in another clue)
'natures in confusion' is the wordplay.
'confusion' is an anagram indicator.
'natures'+'in'='naturesin'
'naturesin' anagrammed gives 'SATURNINE'.
(Other definitions for saturnine that I've seen before include "moody" , "Gloomy (temperament)" , "dismal" , "dull" , "Turn in sea makes one gloomy" .)