The most common and most likely answer to this crossword clue is the 7 letter word TRILOGY
T
R
I
L
O
G
Y
More clues leading to the result TRILOGY
- Attempt to nail one record in series of three
- Three linked works I record in test
- I log in to attempt a really long read
- One on record blocking attempt to produce Gormenghast?
- Attempt to incorporate one book in a cycle
- 22 Essay about one mathematical function in three volumes?
- Essay about current record of events in book group
- Attempt to keep one diary in series of books
- Attempt to cover one record of events in three-volume set
- Attempt to cover one diary in three books
Buddy explains!

The straight part
We know that "a really long read" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a really long read = trilogy.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 TRILOGY mean?
TRILOGY noun- A set of three works of art that are connected, and that can be seen either as a single work or as three individual works. They are commonly found in literature, film, or video games.