The most common and most likely answer to this crossword clue is the 12 letter word DOÂ AWAYÂ WITH
I've seen this crossword clue in The Guardian
D
O
Â
A
W
A
Y
Â
W
I
T
H
Buddy explains!
The straight part
We know that "Abolish" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case abolish = do away with.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.