Cryptic crossword clue
Take off pair of stone fragments; replace with hard, black pipe 6-6

The most common and most likely answer to this crossword clue is the 13 letter word HUBBLE-BUBBLE

I've seen this crossword clue in Independent
H
U
B
B
L
E
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B
U
B
B
L
E


Buddy explains!

The straight part
We know that "pipe (hookah)" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case pipe (hookah) = hubble-bubble.
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 HUBBLE-BUBBLE mean?

HUBBLE-BUBBLE noun
  1. A bubbling sound
  2. A hookah

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