Study some minute stuff in soup (8)
I believe the answer is:
consomme
'soup' is the definition.
(I know that Consomme is a type of soup)
'study some minute stuff' is the wordplay.
'study' becomes 'con' (con can informally mean to study).
'minute' becomes 'm' (abbreviation).
'stuff' means one lot of letters goes inside another.
'some' going around 'm' is 'somme'.
'con'+'somme'='CONSOMME'
'in' is the link.
(Other definitions for consomme that I've seen before include "Clear French meat soup" , "Clear soup made with concentrated stock" , "Liquid food" , "starter course" , "Clear soup usually of beef, veal or chicken" .)