Junior doctor for Bury and Wigan at last (6)

I believe the answer is:

'junior doctor' is the definition.
(term for a student doctor)

'bury and wigan at last' is the wordplay.
'bury' becomes 'inter' (synonyms).
'and' is a charade indicator (letters next to each other).
'at last' indicates one should take the final letters.
The last letter of 'wigan' is 'n'.
'inter'+'n'='INTERN'

'for' is the link.

(Other definitions for intern that I've seen before include "cage", "(American) hospital doctor", "Often unpaid trainee", "Hold in custody", "Shut up".)

I've seen this clue in The Guardian.