The most common and most likely answer to this crossword clue is the 4 plus 4 plus 4 letter word BLOW ONES MIND
B
L
O
W
O
N
E
S
M
I
N
D
Buddy explains!
The straight part
We know that "to send one into raptures" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case to send one into raptures = blow ones mind.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.