The most common and most likely answer to this crossword clue is the 7 letter word READMIT
I've seen this crossword clue in The Guardian
R
E
A
D
M
I
T
More clues leading to the result READMIT
- Let in again to study with Cambridge college
- Again open the door to study with German
- Again take in notice occupying authority
- Welcome again, maître d’s bubbly
- Let in again to study at place of learning
- Boy returning to study gets let in again
- Yet again take in post, including bill
- Let in again to study at American university
- Let in again to study with Cambridge University
- Once more welcome to postpone commercial breaks
Buddy explains!

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.
What does READMIT mean?
READMIT verb- To admit, or allow to enter, again.