The most common and most likely answer to this crossword clue is the 5 letter word TWICE
I've seen this crossword clue in Financial Times
T
W
I
C
E
More clues leading to the result TWICE
- Wandering etc, touring West Indies repeatedly
- Link with facilities interspersed in Times2?
- Double tonic water initially put on the rocks
- ½ 12 ÷x 2
- Double starts to take wonder drug
- Now and again
- On vacation, throw rocks again?
- Repeated order to wet child — you must release hydrant
- 17 Once and once again
- Double XX?
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 TWICE mean?
TWICE adverb- Two times.
- (usually with "as", of a specified quality) Doubled in quantity, intensity, or degree.