Insects, it turned out, one's speciality? (9)
I believe the answer is:
scientist
'speciality?' is the definition.
Both the answer and definition are singular nouns.
Maybe they are linked in a way I don't understand?
'insects it turned out one's' is the wordplay.
'it' becomes ''t' (abbreviation. e.g. in 'tis).
'turned' indicates anagramming the letters.
'out' indicates putting letters inside.
'one' becomes 'i' (Roman numeral).
'insects'+'t'='insectst'
'insectst' with letters rearranged gives 'scentist'.
'scentist' placed around 'i' is 'SCIENTIST'.
Can you help me to learn more?
(Other definitions for scientist that I've seen before include "Eg. Physicist" , "Inset tics for this learned one" , "One studying nature or physics, say" , "Eg, a chemist" , "entomologist maybe" .)