The most common and most likely answer to this crossword clue is the 7 letter word CATFISH
I've seen this crossword clue in Independent
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Buddy explains!

The straight part
We know that "Something less dangerous!" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case something less dangerous! = catfish.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 CATFISH mean?
CATFISH noun- Any fish of the order Siluriformes, mainly found in fresh water, lacking scales, and having barbels like whiskers around the mouth
- To fish for catfish
- Someone who creates a fake profile on a social media platform in order to deceive people.
- Such a fake profile.
- To create and operate a fake online profile to deceive (someone).