The most common and most likely answer to this crossword clue is the 6 letter word U-TURN
I've seen this crossword clue in Independent
U
-
T
U
R
N
More clues leading to the result U-TURN
- No Parking in rise is a policy reversal
- Vengeance shown by sailors in a complete reversal
- Reversal of extremely unjust run-out
- U-boat evacuated vessel making a sudden change of course
- ‘Policy change? Terribly untrue!’
- Complete change in direction brought about by socially acceptable act
- Vessel carrying you on the Seine in reversal of direction
- 180⁰!
- 'Policy change? Terribly untrue!'
Buddy explains!

The straight part
We know that "reversal of direction" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case reversal of direction = u-turn.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 U-TURN mean?
U-TURN noun- A turn in a vehicle carried out by driving in a semicircle in order to travel in the opposite direction.
- A reversal of policy; a volte-face, a backflip