The most common and most likely answer to this crossword clue is the 4 letter word TORS
I've seen this crossword clue in Independent
T
O
R
S
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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 TORS mean?
TORS noun- A craggy outcrop of rock on the summit of a hill, created by the erosion and weathering of rock.
- (South-West England) A hill with such rock formation.
- A tower; a turret.