The most common and most likely answer to this crossword clue is the 7 letter word TUBULAR
I've seen this crossword clue in The Guardian
T
U
B
U
L
A
R
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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 TUBULAR mean?
TUBULAR adjective- Shaped like a tube.
- Relating to, or composed of tubes or tubules
- Cool, awesome.