Might she win 1,000 Guineas? (5)
I believe the answer is:
filly
This might be a double definition.
'might she' is the first definition.
The definition suggests a singular noun which matches the answer.
'win 1000 guineas?' 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 filly that I've seen before include "Young female horse" , "Female horse under four years old" , "Young mare" .)