The most common and most likely answer to this crossword clue is the 6 letter word DEAFEN
D
E
A
F
E
N
More clues leading to the result DEAFEN
- Loud noise, ultimately in head, may do so
- Stun partially, beside a fence
- Provide a fence around to make the noise intolerable
- Block ears of college fellow about female, not male
- Make a racket and feel briefly bad
- Made a fence/wall to soundproof
- Require to put up a loud burst?
- Inside a fence, you can make it soundproof
- Stun grenade in China made of wood ends disastrously
Buddy explains!

The straight part
We know that "Stun" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case stun = deafen.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 DEAFEN mean?
DEAFEN verb- To make deaf, either temporarily or permanently.
- To make soundproof.
- (sometimes figurative) To stun, as with noise.