The most common and most likely answer to this crossword clue is the 7 letter word LEGROOM
I've seen this crossword clue in The Guardian
L
E
G
R
O
O
M
More clues leading to the result LEGROOM
- Participant in French/English wedding has clearance
- Space to stretch, sleep regularly, and prepare
- Comfort zone of the French newly-wed
- The French fellow at match gets space to manoeuvre
- The French stableman makes space
- In Franglais Union, the important chap’s given personal space
- Space for large English curry
- Space for pins on back to fasten
- Nancy’s the marriage partner and source of comfort when travelling
- Adequate space in car for the French servant
Buddy explains!

The straight part
We know that "space to manoeuvre" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case space to manoeuvre = legroom.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 LEGROOM mean?
LEGROOM noun- Space to stretch the legs while seated.
- Space to move in.