Hard to abandon charity broadcast after returning short annotation (7)
I believe the answer is:
notelet
'short annotation' is the definition.
The definition suggests a singular noun which matches the answer. I also know that 'short' relates to this answer.
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for notelet that I've seen before include "Small sheet for letter" , "informal communication" , "Paper for informal letter" , "Message card" , "correspondence" .)