The most common and most likely answer to this crossword clue is the 8 letter word THOUSAND
I've seen this crossword clue in Financial Times
T
H
O
U
S
A
N
D
More clues leading to the result THOUSAND
- Figure you grind down
- Grit attributed to the solver once - that's grand
- Number 17, 18, 19
- Twist and Shout — a great number!
- Brownish-yellow on you is grand
- A large number of handouts ordered
- Cardinal you found sitting on beach?
- Large number finally get short time on beach
- Quantity of handouts distributed
- Grand seeing you on beach
Buddy explains!

The straight part
We know that "M/K/Grand" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case m/k/grand = thousand.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 THOUSAND mean?
THOUSAND numeral- A numerical value equal to 1,000 = 10 × 100 = 103