The most common and most likely answer to this crossword clue is the 7 letter word PROVISO
I've seen this crossword clue in The Times
P
R
O
V
I
S
O
More clues leading to the result PROVISO
- Rider being paid six shillings on round
- Professional endorsement, over for a rider
- Old bombs in possibly poor condition
- Expert finally altered travel document condition
- Condition for face covering finally to be removed
- Rider favouring protection for face when cut
- Volume is in poor, distressed condition
- Clause for and against one, thus
- Condition favouring six to such an extent
- Except for end esplanade is in very ordinary condition
Buddy explains!

The straight part
We know that "Rider" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case rider = proviso.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 PROVISO mean?
PROVISO noun- A conditional provision to an agreement.