The most common and most likely answer to this crossword clue is the 7 letter word SUBSOIL
S
U
B
S
O
I
L
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 SUBSOIL mean?
SUBSOIL noun- The layer of earth that is below the topsoil.
- To turn up the subsoil of.