Stag or doe
I believe the answer is:
deer
This clue is a double definition.
'stag' is the first definition.
(I've seen this before)
'doe' is the second definition.
(thesaurus)
(Other definitions for deer that I've seen before include "Bucks and does?" , "Ruminant(s) -- breed of 13 down" , "Sledge animals for Father Christmas" , "Like a power switch" , "Antler-bearing animal" .)