Some cruets apparently brought back for chemist (7)
I believe the answer is:
pasteur
'chemist' is the definition.
(Pasteur is an example)
'some cruets apparently brought back' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'brought back' says the letters should be written in reverse.
'ruetsap' is hidden within 'cruets apparently'.
'ruetsap' backwards is 'PASTEUR'.
'for' is the link.
(Other definitions for pasteur that I've seen before include "Louis ---, Fr. bacteriologist" , "Pioneer immunologist" , "French chemist, 1822-95" , "French scientist" , "Louis -, nineteenth century French chemist" .)