The most common and most likely answer to this crossword clue is the 9 letter word SCHEDULED
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Buddy explains!
The straight part
We know that "planned" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case planned = scheduled.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 SCHEDULED mean?
SCHEDULED verb- To create a time-schedule.
- To plan an activity at a specific date or time in the future.
- To admit (a person) to hospital as an involuntary patient under the Mental Health Act.
- Planned; according to schedule.
- One who has been scheduled.