The most common and most likely answer to this crossword clue is the 5 letter word TASER
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More clues leading to the result TASER
- A stunner — stare wildly
- Star cast will include European stunner
- Stunner modelled again, maybe, on return
- This stunner taken aback posed again
- Not a serious piece, a shocker
- Stunner posed again looking northward
- Stunner took exam again, having been laid up
- A stunner, she loses her heart in sailor's embrace
- Means to give crook a shocking experience?
- Shock result as error uncovered
Buddy explains!

The straight part
We know that "stunner" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case stunner = taser.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 TASER mean?
TASER noun- A Taser, a handheld device made by Taser International intended to immobilize another by delivering an electric shock.
- (by extension) Any electroshock stun gun.
- To shock a person, thing, individual, or animal with a handheld device with the electric shock that it delivers; to stun with a stun gun.
- To strike verbally or gesturally with ill intents.