Gloomy note disrupted study of insects - Crossword Clue, Answer and ... I believe the answer is: entomology 'study of insects' is the definition. (entomology is the study of insects) 'gloomy note disrupted' is the wordplay. 'disrupted' indicates an anagram. 'gloomy'+'note'='gloomynote' 'gloomynote' anagrammed gives 'ENTOMOLOGY'.