The most common and most likely answer to this crossword clue is the 9 letter word LUNCHTIME
I've seen this crossword clue in The Guardian
L
U
N
C
H
T
I
M
E
More clues leading to the result LUNCHTIME
- Put to sea without a periodical break
- Maybe one hot guy being entertained by uncle lavishly
- Perhaps one adult is missing when boat enters the water
- Period on motorboat without a break
- One perhaps requiring fresh hint with clue about possum’s bottom
- Inlet much improved by midday?
- Period going by motorboat without a break
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 LUNCHTIME mean?
LUNCHTIME noun- The time or hour at or around which lunch is normally eaten.
- A break in work or school to eat lunch.