The most common and most likely answer to this crossword clue is the 8 letter word REPHRASE
I've seen this crossword clue in The Daily Telegraph
R
E
P
H
R
A
S
E
More clues leading to the result REPHRASE
Buddy explains!
The straight part
We know that "Rearrange delivery" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case rearrange delivery = rephrase.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 REPHRASE mean?
REPHRASE verb- To say or write something with different wording.