The most common and most likely answer to this crossword clue is the 6 letter word ACROSS
I've seen this crossword clue in The Guardian
A
C
R
O
S
S
More clues leading to the result ACROSS
- Over a cold, cold sea
- A burden – like this clue?
- A bad mark for this sort of clue
- Inclusive deal hero broadcasts
- Direction of Oscar’s movement
- Essential fact jurors missed from one side to the other
- A difficult thing to bear, over
- An angry sort of clue
- Oscar’s created a clue like this
- Tailless bird stopping behind, as is this?
Buddy explains!

The straight part
We know that "sort of clue" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case sort of clue = across.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 ACROSS mean?
ACROSS noun- (crosswords, often in combination) A word that runs horizontally in the completed puzzle grid or its associated clue.
- From one side to the other.
- On the other side.
- In a particular direction.
- (crosswords) Horizontally.
- To, toward or from the far side of (something that lies between two points of interest).
- On the opposite side of (something that lies between two points of interest).
- Across from: on the opposite side, relative to something that lies between, from (a point of interest).
- From one side to the other within (a space being traversed).
- At or near the far end of (a space).
- Spanning.
- Throughout.
- So as to intersect or pass through or over at an angle.
- In possession of full, up-to-date information about; abreast of.