Could she meet a need for a pony tail? (5)
I believe the answer is:
filly
'a pony tail?' is the definition.
The answer and definition can be both animals as well as being singular nouns.
Maybe there's a link between them I don't understand?
'could she meet a need' is the wordplay.
I cannot quite understand how this works, but
'meet' could be 'fill' (synonyms) and 'fill' is found within the answer.
A single letter 'y' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'for' acts as a link.
Can you help me to learn more?
(Other definitions for filly that I've seen before include "Female horse under four years old" , "Young female horse" , "Young mare" .)