The most common and most likely answer to this crossword clue is the 9 letter word ESPLANADE
I've seen this crossword clue in The Times
E
S
P
L
A
N
A
D
E
More clues leading to the result ESPLANADE
- Some licensees plan a development where trippers take the air?
- Terribly pleased about a new walkway
- Pleased with an extraordinary walk by the seaside
- In Cowes, plan a delightful walk
- A construction of Naples paddler regularly visited?
- Walk where mountains crossed by East European to the west
- Prom one’s included in elapsed riotously
- Seaplane’d crashed somewhere by the coastline
- Where to take in salty air and a sleep, possibly
- Paranormal activity detected on path bordering a deserted coastal area
Buddy explains!

The straight part
We know that "A construction of Naples paddler regularly visited" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a construction of naples paddler regularly visited = esplanade.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 ESPLANADE mean?
ESPLANADE noun- A clear space between a citadel and the nearest houses of the town.
- The glacis of the counterscarp, or the slope of the parapet of the covered way toward the country.
- A grass plat; a lawn.
- Any clear, level space used for public walks or drives; especially, a terrace by the seaside.