Arab finds career in hospital (7)
I believe the answer is:
saracen
'arab' is the definition.
(I know that Saracen is a type of arab)
'career in hospital' is the wordplay.
'career' becomes 'race' (career can mean to race around).
'in' means one lot of letters goes inside another.
'hospital' becomes 'san' (short for sanatorium).
'race' going into 'san' is 'SARACEN'.
'finds' is the link.
(Other definitions for saracen that I've seen before include "Arab fighting the Crusades" , "British Army armoured people carrier" , "Muslim defender in Crusades" , "Ancient warrior" , "Opponent of the Crusaders" .)