Prize taken from astrophysicist (6)
I believe the answer is:
trophy
'prize' is the definition.
(I know that prize can be written as trophy)
'from astrophysicist' is the wordplay.
'from' says the answer is hidden in the clue.
'TROPHY' is hidden in the letters of 'astrophysicist'.
'taken' is the link.
(Other definitions for trophy that I've seen before include "Winner's prize" , "Kind of wife" , "Cup or shield given as a prize" , "Prize symbolising victory" , "Cup given as prize for victory" .)