The most common and most likely answer to this crossword clue is the 2 plus 6 letter word TV DINNER
I've seen this crossword clue in Financial Times
T
V
D
I
N
N
E
R
More clues leading to the result TV DINNER
- Set on eating this?
- . Drunken vintner welcoming daughter’s convenience food
- One from the set menu?
- Fine fare for a couch-potato?
- Meal eaten straight from the box?
- Those introducing The Voice divulge secret recipe for viewer
- Set course in company for Lewis?
- Ex-soldier returns drug-free with daughter having intimate meal
- New intern receives clap getting a frozen meal
Buddy explains!

The straight part
We know that "One from the set menu" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one from the set menu = tv dinner.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.