The most common and most likely answer to this crossword clue is the 9 letter word TURNABOUT
I've seen this crossword clue in The Sunday Telegraph
T
U
R
N
A
B
O
U
T
More clues leading to the result TURNABOUT
- Two spells of illness, between which a complete shift
- Change of policy: you are to arrest visiting solicitor
- Top grades received by everyone attending? That makes a change
- Go to have a fight, showing change of mind
- Act, concerning a volte-face
- Flip-flop with resistance in fish fight
- Dizzy spell and attack of illness after a sudden change
Buddy explains!
The straight part
We know that "sudden change" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case sudden change = turnabout.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 TURNABOUT mean?
TURNABOUT noun- The act of turning about so as to face in the opposite direction
- A reversal of a decision or opinion etc; a change of mind or flip-flop
- A merry-go-round.