The most common and most likely answer to this crossword clue is the 10 letter word CHRONICLES
C
H
R
O
N
I
C
L
E
S
Buddy explains!
The straight part
We know that "historian’s work" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case historian’s work = chronicles.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 CHRONICLES mean?
CHRONICLES noun- A written account of events and when they happened, ordered by time.
- To record in or as in a chronicle.