The most common and most likely answer to this crossword clue is the 10 letter word INDELICATE
I've seen this crossword clue in Independent
I
N
D
E
L
I
C
A
T
E
More clues leading to the result INDELICATE
- Coarse show includes blue material ultimately
- Coarse show embodying extremes of evil
- Show houses occasionally feel vulgar
- Trendy food shop has to supply food, mostly tasteless
- Rude show entertains the Spanish
- Where you might find sandwiches etc a disaster, lacking in taste
- Offensive show about the bowels of hell
- How nice it can be with Aled being immodest!
- Coarse show entertains the Spanish
- Slightly rude flash enthrals the Spanish
Buddy explains!

The straight part
We know that "Coarse" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case coarse = indelicate.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 INDELICATE mean?
INDELICATE adjective- Improper or immodest.
- Coarse or tasteless.
- Tactless or undiplomatic.