Curate muddled about name for mythical creature (7)
I believe the answer is:
centaur
'for mythical creature' is the definition.
(centaur is a kind of mythical creature)
'curate muddled about name' is the wordplay.
'muddled' indicates an anagram.
'about' indicates putting letters inside.
'name' becomes 'n' (common abbreviation e.g. on forms).
'curate' anagrammed gives 'cetaur'.
'cetaur' placed around 'n' is 'CENTAUR'.
(Other definitions for centaur that I've seen before include "Mythological creature" , "Fabulous horse-man" , "'Mythical creature, half man, half horse (7)'" , "Mythical man-horse" , "Fabulous beast, half man and half horse" .)