Desire found in that unprotected creature (5)
I believe the answer is:
hyena
'creature' is the definition.
(type of animal)
'desire found in that unprotected' is the wordplay.
'desire' becomes 'yen' (yen can mean a longing or desire).
'found in' is an insertion indicator.
'unprotected' indicates the central letters.
The central letters of 'that' are 'ha'.
'yen' put inside 'ha' is 'HYENA'.
(Other definitions for hyena that I've seen before include "Flesh-eating dog with eerie laugh" , "Creature" , "Dog-like scavenger" , "African wild dog" , "Meat-eater" .)