Marks monocle is smashed
I believe the answer is:
semicolon
'marks monocle is smashed' is the definition.
I can't tell whether this defines the answer.
'monocle is smashed' is the wordplay.
'smashed' indicates anagramming the letters.
'monocle'+'is'='monocleis'
'monocleis' with letters rearranged gives 'SEMICOLON'.
Can you help me to learn more?
(Other definitions for semicolon that I've seen before include "half a stop" , "Punctuation mark denoting a pause in a sentence" , "can cut sentence" , "Item of punctuation" , "used by writers for a break" .)