The most common and most likely answer to this crossword clue is the 3 plus 2 plus 5 plus 5 letter word DIE IN ONE’S BOOTS
D
I
E
I
N
O
N
E
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™
S
B
O
O
T
S
Buddy explains!
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.