Elroy Jetson's mom (4)
I believe the answer is:
jane
'elroy jetson's mom' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for jane that I've seen before include "swinger's partner, perhaps" , "Plain --; -- Seymour" , "Lady" , "- - Eyre" , "- - Lapotaire, Fonda" .)