The most common and most likely answer to this crossword clue is the 8 letter word GRUESOME
I've seen this crossword clue in The Daily Telegraph
G
R
U
E
S
O
M
E
More clues leading to the result GRUESOME
- Very unpleasant morgues upset English
- Being nasty increased a great deal, we hear
- Leave note without regrets? That’s horrible!
- Multiplied total? Sounds horrible
- Increased amount of money mentioned inspiring horror
- Horrible soup a few left out
- Terrible Harry Grout mostly with yours truly taking drugs
- Repugnant having several pursuing unnatural urge
- Macabre morgue’s demolished close to home
- Horrible German to be sorry? A little
Buddy explains!

The straight part
We know that "Macabre" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case macabre = gruesome.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 GRUESOME mean?
GRUESOME adjective- Repellently frightful and shocking; horrific or ghastly.