The most common and most likely answer to this crossword clue is the 10 letter word MEERSCHAUM
I've seen this crossword clue in The Guardian
M
E
E
R
S
C
H
A
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M
More clues leading to the result MEERSCHAUM
- Note written by Queen’s friend sucking a pipe
- Pipe cracked each summer
- Pipe disintegrating each summer
- Untangling a rum scheme, one of Sherlock’s pleasures
- Parent drinking bubbly reaches for a pipe
- White mineral ground up each summer
- It’s smoked and cured each summer
- Pipe bursts each summer
- Master unusual measure to insulate central heating pipe
- Pipe made flexible each summer
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 = meerschaum.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 MEERSCHAUM mean?
MEERSCHAUM noun- A soft white mineral, chiefly used for smoking-pipes and cigar holders.
- A smoking-pipe made from meerschaum.