The most common and most likely answer to this crossword clue is the 7 letter word SCHMUCK
I've seen this crossword clue in The Times
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More clues leading to the result SCHMUCK
Buddy explains!

The straight part
We know that "Idiot diverted" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case idiot diverted = schmuck.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 SCHMUCK mean?
SCHMUCK noun- A jerk; a person who is unlikable, detestable, or contemptible because he or she is stupid, foolish, clumsy, oafish, inept, malicious, or unpleasant.
- A deplorable, pitiful person; often in the form poor schmuck.