The most common and most likely answer to this crossword clue is the 11 letter word ENUMERATION
I've seen this crossword clue in The Sunday Telegraph
E
N
U
M
E
R
A
T
I
O
N
More clues leading to the result ENUMERATION
Buddy explains!
The straight part
We know that "Detailed account" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case detailed account = enumeration.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 ENUMERATION mean?
ENUMERATION noun- The act of enumerating, making separate mention, or recounting.
- A detailed account, in which each thing is specially noticed.
- A recapitulation, in the peroration, of the heads of an argument.
- A data type that allows variables to have any of a predefined set of values.