The most common and most likely answer to this crossword clue is the 8 letter word REAR-END
I've seen this crossword clue in The Times
R
E
A
R
-
E
N
D
More clues leading to the result REAR-END
Buddy explains!

The straight part
We know that "another" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case another = rear-end.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 REAR-END mean?
REAR-END verb- Of a vehicle, to strike (another vehicle) from behind.