The most common and most likely answer to this crossword clue is the 7 letter word SEXLESS
I've seen this crossword clue in Financial Times
S
E
X
L
E
S
S
Buddy explains!

The straight part
We know that "Neither male nor female" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case neither male nor female = sexless.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does SEXLESS mean?
SEXLESS adjective- Without sexual activity.
- Without physical or behavioral sexual distinction.
- Provoking or showing no sexual desire
- Without sex appeal