The most common and most likely answer to this crossword clue is the 8 letter word DERANGED
I've seen this crossword clue in Financial Times
D
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A
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D
More clues leading to the result DERANGED
- Disturbed and called into action
- Called into action and driven mad
- Document banks called crazy
- Called into action? That's mad
- Mad to have gardened in a storm
- Indeed, called crazy
- Cuckoo seen in borders of desolate wild garden
- Driven mad by half-hearted performance getting cooker installed
- Ditheringly dredge — and mostly in the wrong place
- Called into action – driven mad
Buddy explains!

The straight part
We know that "driven mad" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case driven mad = deranged.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 DERANGED mean?
DERANGED verb- (chiefly passive) To cause (someone) to go insane or become deranged.
- To cause disorder in (something); to distort from its ideal state.
- To disrupt somebody's plans, to inconvenience someone; derail.
- Disturbed or upset, especially mentally
- Insane