The most common and most likely answer to this crossword clue is the 6 letter word ANGELA
I've seen this crossword clue in The Guardian
A
N
G
E
L
A
More clues leading to the result ANGELA
- An upper-class girl? A girl
- Strange Lancastrian housing name
- A new hair product possibly needed by a lady
- A new setter, one’s female!
- Orange ladies include her
- Girl with a new angle
- Girl writing Guardian article
- Change lanes, overtaking woman
- Say Merkel makes investor apprehensive at first
- Foreign girl’s name from strange language
Buddy explains!

The straight part
We know that "lad/y" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case lad/y = angela.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.