Crossword Genius

Does a job in the exam office for college rector's boss (8)

Ross

I believe the answer is:

corrects

I'm a little stuck... Click here to teach me more about this clue!

'does a job in the exam office' is the definition.
I can't judge whether this definition defines the answer.

'college rector's boss' is the wordplay.
I cannot quite see how this works, but
'college' could be 'c' and 'c' is found within the answer.
an anagram of 'rector' is 'orrect' which is present in the answer.
A single letter 's' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...

'for' is the link.

Can you help me to learn more?

(Other definitions for corrects that I've seen before include "Sets or puts right" , "Disciplines" , "Makes right" , "Adjusts, puts right" , "Rectifies" .)

I've seen this clue in The Irish Times.
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