The most common and most likely answer to this crossword clue is the 6 letter word CLAUSE
I've seen this crossword clue in The Guardian
C
L
A
U
S
E
More clues leading to the result CLAUSE
- In speech, scratches part of a sentence
- Joker, say, adding line to advantage
- Cryptic clues? Answer is found in part of sentence
- Section of a will for Santa, we’re told
- Reason to keep line in section of contract
- Reason to accept large part of contract
- A few words nipper’s read aloud
- Perhaps rider in lead to take on large entry
- Legal section periodically call at practice
- A clue’s disguised in part of sentence
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 CLAUSE mean?
CLAUSE noun- (grammar) A verb, its necessary grammatical arguments, and any adjuncts affecting them.
- (grammar) A verb along with its subject and their modifiers. If a clause provides a complete thought on its own, then it is an independent (superordinate) clause; otherwise, it is (subordinate) dependent.
- A separate part of a contract, a will or another legal document.
- (shipping) To amend (a bill of lading or similar document).