Not out there and not empty - that’s only natural (8)
I believe the answer is:
inherent
'natural' is the definition.
(I've seen this before)
'not out there and not empty' is the wordplay.
'not out' becomes 'in' ('in' is the opposite to 'out').
'there' becomes 'here' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'and' says to put letters next to each other.
'empty' says to hollow out the word (remove centre letters).
'not' with its middle taken out is 'nt'.
'in'+'here'+'nt'='INHERENT'
'that's only' acts as a link.
Can you help me to learn more?
(Other definitions for inherent that I've seen before include "deep-rooted" , "Basic" , "Inborn or intrinsic" , "Built-in, integral" , "Necessary as a part" .)