The most common and most likely answer to this crossword clue is the 9 letter word PROMENADE
I've seen this crossword clue in The Guardian
P
R
O
M
E
N
A
D
E
More clues leading to the result PROMENADE
- Map redone –rearranged walk
- Seafront is for crew forced to abandon leader
- Old people in procession leaving a college dance
- Uncouth Roman peed in walkway
- In favour of people getting stated equipment to help walk
- Walk recollected in Arden poem
- A walk for males with a date after vacation
- Walk open-armed when upset
- Drive for soldiers with nameless drug
- Padre gets distraught about portent in front?
Buddy explains!

The straight part
We know that "Walk" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case walk = promenade.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 PROMENADE mean?
PROMENADE noun- A prom (dance).
- A walk taken for pleasure, display, or exercise; a stroll.
- A place where one takes a walk for leisurely pleasure, or for exercise, especially a terrace by the seaside.
- A dance motion consisting of a walk, done while square dancing.
- To walk for amusement, show, or exercise.
- To perform the stylized walk of a square dance.