The most common and most likely answer to this crossword clue is the 7 letter word NOSH-UP
I've seen this crossword clue in Financial Times
N
O
S
H
-
U
P
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 NOSH-UP mean?
NOSH-UP noun- A feast; a hearty meal.