Cryptic crossword clue
Evidence of volcanic activity perhaps from an exceptionally warm May? 3,6

The most common and most likely answer to this crossword clue is the 3 plus 6 letter word HOT SPRING

H
O
T
S
P
R
I
N
G

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The cryptic/wordplay part
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This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
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