Astronomer given work in nuclear research centre is going round Cambridge University (10)
I believe the answer is:
copernicus
'astronomer' is the definition.
(I've seen this before)
'work in nuclear research centre is going round cambridge university' is the wordplay.
'work' becomes 'op' (abbreviation for opus**).
'in' means one lot of letters goes inside another.
'nuclear research centre' becomes 'cern'.
'going round' means one lot of letters goes inside another.
'cambridge university' becomes 'cu'.
'op' going inside 'cern' is 'copern'.
'is' going around 'cu' is 'icus'.
'copern'+'icus'='COPERNICUS'
'given' is the link.
(Other definitions for copernicus that I've seen before include "16th century astronomer" , "Polish scholar" , "Famous Prussian" , "He said we move in a ring" , "Polish astronomer d. 1543" .)