The most common and most likely answer to this crossword clue is the 8 letter word MILKMAID
I've seen this crossword clue in The Times
M
I
L
K
M
A
I
D
Buddy explains!
The straight part
We know that "this female works in dairy" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case this female works in dairy = milkmaid.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 MILKMAID mean?
MILKMAID noun- A girl or young woman who milks the cows on a farm