The most common and most likely answer to this crossword clue is the 8 letter word DOORBELL
I've seen this crossword clue in The Daily Telegraph
D
O
O
R
B
E
L
L
More clues leading to the result DOORBELL
- Cause of a ding-dong when visitor arrives?
- Exotic bordello you ring from outside
- Party with gold cracker announced – a guest might activate it outside
- Chicks raised wing as indicator of arrival
- Used to seek opening in party sphere before primary elections loomed large
- Way to achieve entrance as backward children, English learners
- Visitor may get a buzz out of this implement, or phone inventor
- It indicates you’ve arrived — don’t knock it!
- One should admit when one is depressed
- Chime rings in valley
Buddy explains!

The straight part
We know that "Visitor may get a buzz out of this" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case visitor may get a buzz out of this = doorbell.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 DOORBELL mean?
DOORBELL noun- A device on or adjacent to an outer door for announcing one's presence. It can be mechanical, directly sounding a bell, or a button that electrically sounds a chime or buzzer inside the building.
- A button that actives an electric doorbell.
- To ring many doorbells in an effort to contact people and thereby spread information or solicit.
- To ring many doorbells of (target people or an area) in an effort to contact people and thereby spread information or solicit.