Potentially ideal woman (5)
I believe the answer is:
delia
'woman' is the definition.
'potentially ideal' is the wordplay.
'potentially' indicates an anagram (letters have the potential to spell a new word).
'ideal' with letters rearranged gives 'DELIA'.
(Other definitions for delia that I've seen before include "Girl" , "-- Smith, TV cook" , "Woman" , "Sonnets to - (Daniel)" , "-- Smith, cookery writer" .)