The most common and most likely answer to this crossword clue is the 4 plus 4 letter word TIME SLOT
I've seen this crossword clue in The Guardian
T
I
M
E
S
L
O
T
More clues leading to the result TIME SLOT
- , 23. Newspaper facing doom for a limited period
- Large amount put on paper in set period
- When something should happen by fate
- Place in the schedule: male in draw lost out
- Group of our competitors getting a few minutes of broadcast?
- It can be scheduled by destiny
- Journalists on Telegraph rival getting appointment for TV programme?
- Newspaper group coming together for a limited period
- Reverend airing sticky stuff with kid in scheduled hour
- Daily item on sale for scheduled period
Buddy explains!

The straight part
We know that "scheduled period" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case scheduled period = time slot.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.