Consumed by fear, mad illogical creature (9)
I believe the answer is:
armadillo
'creature' is the definition.
(armadillo is a kind of creature)
'consumed by fear mad illogical' is the wordplay.
'consumed by' indicates a hidden word (I've seen this in other clues).
'ARMADILLO' is hidden within 'fear mad illogical'.
(Other definitions for armadillo that I've seen before include "Burrowing mammal with a covering of bony plates" , "armour-plated type" , "animal on the loose!" , "Molar laid out for the horny-plated animal" , "Dollar, ami for S American animal with bony plates" .)