The most common and most likely answer to this crossword clue is the 10 letter word SCANDALISE
I've seen this crossword clue in Independent
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More clues leading to the result SCANDALISE
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The straight part
We know that "shock" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case shock = scandalise.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 SCANDALISE mean?
SCANDALISE verb- To cause great offense to (someone).
- To reproach.
- To disgrace.
- To libel.
- To reduce the area and efficiency of a sail by expedient means (e.g. slacking the peak and tricing up the tack) without properly reefing, thus slowing boat speed.