Female, a little lower? (6)
I believe the answer is:
heifer
This could be a double definition.
'female' is the first definition.
The answer and definition can be both animals as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'a little lower?' is the second definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
Can you help me to learn more?
(Other definitions for heifer that I've seen before include "Cow that has borne one or no calves" , "Young cow which has not yet given birth" , "part of stock" , "a little lower" , "Female bovine that has not given birth" .)