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

The straight part
We know that "ridicule" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ridicule = jesting.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 JESTING mean?
JESTING verb- To tell a joke; to talk in a playful manner; to make fun of something or someone.
- Joking
- Bantering; ridicule
- Mocking
- Facetious
- Humorous
- Playful; mocking
- Jeering