The most common and most likely answer to this crossword clue is the 7 letter word NO-SHOW
I've seen this crossword clue in Independent
N
O
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S
H
O
W
More clues leading to the result NO-SHOW
- I felt that food comes first for absentee
- One failing to turn up — boy turned up, by the way
- Someone not turning up with food immediately lacks a bit of neighbourliness
- She doesn’t appear to eat innards of fowl
- One who’s unexpectedly not here, ultimately?
- She doesn’t turn up for food. That hurts!
- Absentee back on display
- Son who plays truant
Buddy explains!

The straight part
We know that "One who’s unexpectedly not here, ultimately" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one who’s unexpectedly not here, ultimately = no-show.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 NO-SHOW mean?
NO-SHOW noun- An absence; failure to show up or to make a scheduled appearance, especially at a hotel or a place of employment.
- A person or group that does not show up.
- To fail to show up for something.