The most common and most likely answer to this crossword clue is the 8 letter word UNHORSED
I've seen this crossword clue in The Daily Telegraph
U
N
H
O
R
S
E
D
Buddy explains!
The straight part
We know that "Made the young go off their rockers" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case made the young go off their rockers = unhorsed.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 UNHORSED mean?
UNHORSED verb- To forcibly remove from a horse.
- (by extension) To disrupt or unseat; to remove from a position.