Creature oddly doomed (3)
I believe the answer is:
doe
'creature' is the definition.
(doe is a kind of creature)
'oddly doomed' is the wordplay.
'oddly' means one should take alternating letters.
The alternating letters of 'doomed' are 'DOE'.
(Other definitions for doe that I've seen before include "Last FA Cup winners" , "Animal" , "She eats vegetarian food" , "Ode to a female rabbit" , "She's a deer" .)