Incomplete check leading to zero sound (5)
I believe the answer is:
audio
'sound' is the definition.
(audio means sound)
'incomplete check leading to zero' is the wordplay.
'incomplete check leading' becomes 'audi' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'to zero' becomes 'O' (O resembles 0).
'audi'+'o'='AUDIO'
Can you help me to learn more?
(Other definitions for audio that I've seen before include "Relating to sound or hearing" , "in the sound department?" , "type of reproduction" , "- Tape; - typist" , "Prefix relating to sound" .)