Cryptic crossword clue
River of soil causes animal to retreat to every other mound in front 7

The most common and most likely answer to this crossword clue is the 7 letter word MUDFLOW

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Buddy explains!

The straight part
We know that "River of soil" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case river of soil = mudflow.
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 MUDFLOW mean?

MUDFLOW noun
  1. A type of landslide characterized by large flows of mud and water.
  2. The dried-out product of such a flow.

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