The most common and most likely answer to this crossword clue is the 10 letter word EVALUATION
E
V
A
L
U
A
T
I
O
N
Buddy explains!
The straight part
We know that "assessment" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case assessment = evaluation.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 EVALUATION mean?
EVALUATION noun- An assessment, such as an annual personnel performance review used as the basis for a salary increase or bonus, or a summary of a particular situation.
- A completion of a mathematical operation; a valuation.
- Determination of the value of a variable or expression.