The most common and most likely answer to this crossword clue is the 6 letter word RIPRAP
R
I
P
R
A
P
More clues leading to the result RIPRAP
Buddy explains!

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 RIPRAP mean?
RIPRAP noun- An underwater bank seen as a danger to shipping.
- Rocks or other materials used to shore up an embankment, deter or prevent erosion, guide shipping, or serve as a temporary mooring.
- To form a riprap in or upon.