The most common and most likely answer to this crossword clue is the 7 letter word STOPGAP
I've seen this crossword clue in Independent
S
T
O
P
G
A
P
More clues leading to the result STOPGAP
- Temporary way old people initially getting break
- Substitute having lifted silver trophy’s heading for pub
- Energy required to hold high note, just for a while
- Go past building that’s quiet just for now
- Stacks of cash over at retail chain – it’s only temporary
- This’ll do for now, end with opening
- Interim post reviewed, one held by doctor
- Provisional golf tournament bagged by second best
- Temporary expedient to close up breach
- Caretaker getting wind up over omission
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 = stopgap.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 STOPGAP mean?
STOPGAP noun- That which fills a gap or hiatus.
- A temporary measure or short-term fix used until something better can be obtained; that which serves as an expedient in an emergency; a band-aid solution.
- Filling a gap or pause.
- Temporary; short-term.