The most common and most likely answer to this crossword clue is the 5 letter word EMILY
I've seen this crossword clue in The Guardian
E
M
I
L
Y
More clues leading to the result EMILY
- Fruit raised by unknown woman
- A Brontë vacuously missing the point
- Girl takes north-south road through cathedral city
- See about note for one of three sisters
- Girl climbing tree by yard
- She appears in road in cathedral town
- One of a trio of writers in the family omitting pairs of leading characters
- Girl I married over in cathedral city
Buddy explains!
The straight part
We know that "One of a trio of writers" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one of a trio of writers = emily.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.