Crossword Genius

Hubble-bubble (6)

Ross

I believe the answer is:

hookah

'hubble-bubble' is the definition.
(synonyms)

This is the entire clue.

(Other definitions for hookah that I've seen before include "Smoking pipe, using water" , "Oriental water pipe for smoking" , "Pipe for smoking marijuana etc" , "A pipe; sounds like a rugby position" , "Sort of pipe" .)

I've seen this clue in The Guardian and the Evening Standard.
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