### Clue: Special note on half-hearted crowd (9)
### Answer: MEMORABLE 
 ### Explanation: Definition: Special
 MEMO(short for "memorandum"/an informative note) **placed above**(on, in a down clue) [ "b"(one of the 2 core letters) **deleted from**(half-hearted) "rabble"(a disorderly crowd) ].