The most common and most likely answer to this crossword clue is the 6 letter word POOTER
I've seen this crossword clue in The Guardian
P
O
O
T
E
R
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 POOTER mean?
POOTER noun- A glass jar used for collecting small insects etc; it has two tubes, one (protected by a gauze) which is sucked, the other up which the insect is drawn.