The most common and most likely answer to this crossword clue is the 4 plus 4 letter word SENT DOWN
I've seen this crossword clue in The Daily Telegraph
S
E
N
T
D
O
W
N
More clues leading to the result SENT DOWN
- Student now sadly denied university time, being this?
- Dons went wild — expelled from the university
- Expelled from university and conveyed to prison
- Expelled from university and locked up
- Dismissed from uni with less of an odour, we hear?
- Imprisoned in small hospital unit, suffering from depression
- Dons went mad away from Oxford?
Buddy explains!

The straight part
We know that "away from Oxford" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case away from oxford = sent down.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.