The most common and most likely answer to this crossword clue is the 9 letter word ADJOURNED
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More clues leading to the result ADJOURNED
Buddy explains!

The straight part
We know that "postponed for another day" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case postponed for another day = adjourned.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 ADJOURNED mean?
ADJOURNED verb- To postpone.
- To defer; to put off temporarily or indefinitely.
- To end or suspend an event.
- To move as a group from one place to another.
- (of a meeting, event or trial) Having been adjourned; suspended or paused.