The most common and most likely answer to this crossword clue is the 10 plus 4 letter word WELLINGTON BOOT
I've seen this crossword clue in The Times
W
E
L
L
I
N
G
T
O
N
B
O
O
T
More clues leading to the result WELLINGTON BOOT
- Disapproving cry from New Zealanders having little time for a stick-in-the-mud?
- One of two confining the flanks at Waterloo?
- Gushing in 5 about nice top footwear
- Water thus rising further round end of garden? Wear this
- Cockpit in sports car not about suppressing unwanted noise, but it should keep you dry
Buddy explains!
The straight part
We know that "One of two confining the flanks at Waterloo?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one of two confining the flanks at waterloo? = wellington boot.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.