The most common and most likely answer to this crossword clue is the 4 plus 4 letter word HULA HOOP
I've seen this crossword clue in The Guardian
H
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A
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Buddy explains!
The straight part
We know that "Ring/:" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ring/: = hula hoop.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 HULA HOOP mean?
HULA HOOP noun- A toy in the form of a large hoop which is twirled around various parts of the body, especially the waist.