Those who have this shouldn't feel hungry (5)
I believe the answer is:
eaten
'hungry' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?
'those who have this shouldn't feel' is the wordplay.
I cannot really see how this works, but
'have' could be 'eat' (eating is a kind of having) and 'eat' is located in the answer.
The remaining letters 'en' 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 eaten that I've seen before include "What's taken in" , "having enjoyed dinner?" , "Crammed" , "This bread is soon forgotten, it's said" , "demolished, possibly" .)