The most common and most likely answer to this crossword clue is the 6 letter word THEIRS
I've seen this crossword clue in The Daily Telegraph
T
H
E
I
R
S
More clues leading to the result THEIRS
- First of three successors belonging to them
- That lot’s those likely to succeed after time
- “For Auditors” – that’s the point of them
- Sir, the confusion is not yours
- The American taxmen will get what belongs to them
- Whose is the one with vacant rooms?
- Letters from oldest heir showing what belongs to them?
- The tax agency is not ours
- d Inheritors pursuing terrain primarily belonging to them
- They collect money and what belongs to them
Buddy explains!
The straight part
We know that "what belongs to them" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case what belongs to them = theirs.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 THEIRS mean?
THEIRS pronoun- That which belongs to them; the possessive case of they, used without a following noun.