Astronaut Ochoa (5)
I believe the answer is:
ellen
'astronaut ochoa' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ellen that I've seen before include "-- DeGeneres, US actress" , "Dame - Terry, English actress" , "It could be Terry" , "- Terry, Eng. actress" , "the Lady of the Lake" .)