The most common and most likely answer to this crossword clue is the 4 letter word ORTS
I've seen this crossword clue in The Daily Telegraph
O
R
T
S
More clues leading to the result ORTS
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 ORTS mean?
ORTS noun- (usually in plural) A fragment; a scrap of leftover food; any remainder; a piece of refuse.