The most common and most likely answer to this crossword clue is the 10 letter word BLACKADDER
I've seen this crossword clue in The Daily Telegraph
B
L
A
C
K
A
D
D
E
R
More clues leading to the result BLACKADDER
- TV comedy increasingly awful, some say? Want to cut it
- Very gloomy summer, a 5
- Want to cut extra evil, vulgar sitcom character
- One who went forth in break: he’s got seven more!
- Historical sitcom, possibly worse without something missing
- Crazy Baldrick idea, without the slightest bit of intelligence, repeatedly, on this?
- British want to include ‘ER’, a TV series
- Bald, racked characters reincarnated in TV comedy
- 6 billion miss out on summer
- Miss gets overawed by more evil TV series
Buddy explains!

The straight part
We know that "TV comedy" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case tv comedy = blackadder.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.