Auditor’s breakfast item in series (6)
I believe the answer is:
serial
'item in series' is the definition.
'serial' can be an answer for 'series' (synonyms). I'm not certain of the 'item in' bit.
'auditor's breakfast' is the wordplay.
'auditor's' shows a homophone (sound like).
'breakfast' becomes 'cereal' (I've seen this before).
'cereal' is a homophone of 'SERIAL'.
Can you help me to learn more?
(Other definitions for serial that I've seen before include "Program that's often on" , "Publication in instalments" , "Continuous, perhaps like mulitple killer ( 6)" , "appearing at regular intervals" , "Of continuous nature - maybe a killer" .)