Article concerning appetite heartlessly impractical (9)
I believe the answer is:
theoretic
'impractical' is the definition.
(I've seen this before)
'article concerning appetite heartlessly' is the wordplay.
I cannot really understand how this works, but
'article' could be 'the' (the definite article in English) and 'the' is found in the answer.
'concerning' could be 're' (both can mean on a particular topic) and 're' is found within the answer.
The remaining letters 'otic' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for theoretic that I've seen before include "purely speculative" , "impractical" , "Not practical" .)