The most common and most likely answer to this crossword clue is the 8 letter word UNSOCIAL
I've seen this crossword clue in Independent
U
N
S
O
C
I
A
L
More clues leading to the result UNSOCIAL
Buddy explains!

The straight part
We know that "bad for company" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case bad for company = unsocial.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 UNSOCIAL mean?
UNSOCIAL adjective- Not social.
- Not seeking or showing the desire for the company of others; inhospitable.