A kiss cut short to show affection for one that may be related (8)
I believe the answer is:
Here is my best explanation:
'one that may be related' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'a kiss cut short to show affection for' is the wordplay.
'kiss' becomes 'neck' (I've seen this before).
'cut short' means to remove the last letter.
'to show affection for' becomes 'dote' (I've seen this before).
'neck' with its final letter taken off is 'nec'.
(Other definitions for anecdote that I've seen before include "Yarn", "Account regarded as unreliable", "Pithy account of an incident", "A short interesting story, usually true", "Humorous story", "Interesting story", "Short amusing story", "Short account of an incident", "Short and amusing/interesting story" and "Tale".)