The most common and most likely answer to this crossword clue is the 6 letter word HOOKAH
H
O
O
K
A
H
Buddy explains!
The straight part
We know that "pipe" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case pipe = hookah.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 HOOKAH mean?
HOOKAH noun- A pipe with a long flexible tube that draws the smoke through water, traditionally used for smoking tobacco, which is often flavored.