The most common and most likely answer to this crossword clue is the 7 letter word INTERIM
I've seen this crossword clue in Independent
I
N
T
E
R
I
M
More clues leading to the result INTERIM
- Popular one in academic period is temporary
- One entering popular phrase for caretaker
- Lag, one put inside when students attend school
- When schools are open, including one for acting?
- During school time, engaging one as a temp?
- Fit and well-kept, full of energy for acting
- Provisional offering from Pinter impressed
- One kept in during school break
- Meanwhile, waste time in middle of performance
- One admitted during school time as caretaker
Buddy explains!

The straight part
We know that "Provisional" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case provisional = interim.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 INTERIM mean?
INTERIM noun- A transitional or temporary period between other events.
- Transitional.
- Temporary.