Little bit inspired by some science (7)
I believe the answer is:
anatomy
'science' is the definition.
(anatomy is a kind of science)
'little bit inspired by some' is the wordplay.
'little bit' becomes 'atom' (tiny particle).
'inspired by' is an insertion indicator (some letters breathed in or 'inspired' by others).
'some' becomes 'any' (similar in meaning).
'atom' going within 'any' is 'ANATOMY'.
(Other definitions for anatomy that I've seen before include "Science of bodily structure" , "Study of bodies" , "Branch of biology" , "Study of (physical structure of) living things" , "Study of animal structures" .)