Gloomy note about creepy study (10)
I believe the answer is:
entomology
'creepy study' is the definition.
'entomology' can be an answer for 'study' (entomology is a kind of study). I am not certain of the 'creepy' bit.
'gloomy note about' is the wordplay.
'about' indicates anagramming the letters.
'gloomy'+'note'='gloomynote'
'gloomynote' anagrammed gives 'ENTOMOLOGY'.
Can you help me to learn more?
(Other definitions for entomology that I've seen before include "probing into insect life" , "Study of insects" , "in which cricket may be studied" , "cricket field, for example" , "Science" .)