The most common and most likely answer to this crossword clue is the 10 letter word PEASHOOTER
I've seen this crossword clue in The Daily Telegraph
P
E
A
S
H
O
O
T
E
R
More clues leading to the result PEASHOOTER
- Ape’s snarling snout? A weapon of doubtful destruction!
- Toy with ape’s wobbly nose
- Hope a store abandoned offensive kid’s toy
- A git loading safe weapon for kids
- Missile-launcher that gets the pulse going
- Toy poodle’s tail blocking dad’s nose
- Blowpipe exercises with a small horn
- Warning on vegetables that sends pulse racing
- Primitive weapon for lord hosting an event on grouse moor
- Fellow holding a dart for toy weapon
Buddy explains!

The straight part
We know that "that sends pulse racing" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case that sends pulse racing = peashooter.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 PEASHOOTER mean?
PEASHOOTER noun- A toy gun, consisting of a tube through which peas or small objects are blown.
- Any small or ineffective gun.