The most common and most likely answer to this crossword clue is the 5 plus 3 letter word DOGGY BAG
I've seen this crossword clue in The Times
D
O
G
G
Y
B
A
G
More clues leading to the result DOGGY BAG
- In which spare food is taken back to the lab?
- Just like an animal, to grab any spare food here
- Harry has joke about yobs regularly getting leftovers container
- Place reserved for dinner scraps setter’s intended treat?
- Takeaway food setter gets by going up in silence
- Chow for the chow in this possibly?
- Food here may be taken back to the lab
Buddy explains!

The straight part
We know that "any spare food here" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case any spare food here = doggy bag.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.