Some Indo-European female (3)
I believe the answer is:
doe
'female' is the definition.
(female deer)
'some indo-european' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'DOE' is hidden within 'indo european'.
(Other definitions for doe that I've seen before include "She eats vegetarian food" , "Buck's mate" , "Ode to a female rabbit" , "female in the field?" , "possible mate for Rudolph?" .)