The most common and most likely answer to this crossword clue is the 6 letter word BUZZER
B
U
Z
Z
E
R
Buddy explains!
The straight part
We know that "Bell" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case bell = buzzer.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 BUZZER mean?
BUZZER noun- One who, or that which, buzzes; an insect that buzzes.
- A device that makes a buzzing sound.
- A police badge.
- A run scored from an overthrow.
- A gossip.