Cryptic crossword clue
Going mad circling bottom of oak tree 6

The most common and most likely answer to this crossword clue is the 6 letter word GINKGO

I've seen this crossword clue in The Daily Telegraph
G
I
N
K
G
O

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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 GINKGO mean?

GINKGO noun
  1. Ginkgo biloba, a tree native to China with small, fan-shaped leaves and edible seeds.
  2. The seed of the ginkgo tree.

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