Creatures of dementia (3)
I believe the answer is:
men
'creatures' is the definition.
The answer and definition can be both animals as well as being plural nouns.
Maybe you can see a link between them that I can't see?
'of dementia' is the wordplay.
'of' says the answer is hidden in the clue.
'MEN' is hidden in the letters of 'dementia'.
Can you help me to learn more?
(Other definitions for men that I've seen before include "Fellows, chaps" , "Chess pieces" , "Soldiers" , "Male humans" , "Males of Armenian extraction." .)