Imprison the young doctor without trial? (6)
I believe the answer is:
intern
'imprison the young doctor without trial?' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for intern that I've seen before include "Confine - physician in US hospital" , "Official language of Pakistan" , "Imprison (enemy aliens)" , "Confine - person on work experience" , "Often unpaid trainee" .)