The most common and most likely answer to this crossword clue is the 11 letter word RESIGNATION
I've seen this crossword clue in The Times
R
E
S
I
G
N
A
T
I
O
N
More clues leading to the result RESIGNATION
- Notice eating irons wrongly placed
- Notice manner in which chess game may end?
- Notice character in establishment, heading off
- Response of some leaders to Brexit crisis might be put into words as “We’ll just have to lump it”
- Etonian rigs renewed surrender
- …notice acquiescence
- Giving notice eating irons must be replaced
Buddy explains!

The straight part
We know that "Notice/manner in which chess game may end?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case notice/manner in which chess game may end? = resignation.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 RESIGNATION mean?
RESIGNATION noun- The act of resigning.
- A written or oral declaration that one resigns.
- State of uncomplaining acceptance in the face of something undesirable but unavoidable.
- The form by which a vassal returns the feu into the hands of a superior.