The most common and most likely answer to this crossword clue is the 9 letter word CHIPOLATA
I've seen this crossword clue in The Guardian
C
H
I
P
O
L
A
T
A
More clues leading to the result CHIPOLATA
- Cold joint with a lot wrong, a small bit of food
- Capital of Honduras initially repackaged meat product
- Companion, a pilot, chewed a sausage
- In opening drink, starts to taste sausage
- . Recall a short anecdote behind Nick’s old banger
- Fruit in soft drink that’s oddly part of 9, maybe?
- Chapati about to be stuffed with short old sausage
- Sausage and tea to keep a pilot refreshed
- Dash at a clip round horse, then old banger
- Slippery oil patch next to a little banger
Buddy explains!

The straight part
We know that "banger" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case banger = chipolata.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 CHIPOLATA mean?
CHIPOLATA noun- A type of small thin meat sausage from Europe.