Item for discussion is not quite lacking it, somehow (8)
I believe the answer is:
question
'item for discussion' is the definition.
I can't judge whether this definition defines the answer.
'is not quite lacking it somehow' is the wordplay.
'lacking' is a deletion indicator.
'somehow' indicates anagramming the letters.
'is'+'not'+'quite'='isnotquite'
'isnotquite' with 'it' taken away is 'isnotque'.
'isnotque' anagrammed gives 'QUESTION'.
Can you help me to learn more?
(Other definitions for question that I've seen before include "Grill" , "Enquiry; doubt" , "Doubt; object to" , "Poser" , "Interrogative sentence" .)