The most common and most likely answer to this crossword clue is the 7 letter word UNREADY
I've seen this crossword clue in The Daily Telegraph
U
N
R
E
A
D
Y
More clues leading to the result UNREADY
- Slow to act, having not studied theory, ultimately
- Holding back, like our old monarch?
- Not working yet, illiterate and unknown
- Not prepared to study in a Parisian yard
- In fun, read Yeats, find yourself badly prepared
- Not quite there, as tomorrow’s news is by end of today?
- Not prepared and not studied! Why, for crying out loud?
Buddy explains!

The straight part
We know that "Not prepared" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case not prepared = unready.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 UNREADY mean?
UNREADY adjective- Not ready.