### Clue: Type of apostrophe produced by semi-literate costermonger (not me!) should be deleted (7)
### Answer: GROCER’S 
 ### Explanation: Definition: Type of apostrophe
 **Anagram of**(semi-literate;poorly written) [ "costermonger" **minus**(… should be deleted) "not me" ].
Defn: The apostrophe that is mistakenly used on a sign and that should therefore be deleted – something that a semi-literate costermonger might do.**
Though of course, other establishments do it too.