The most common and most likely answer to this crossword clue is the 9 letter word DOOLITTLE
I've seen this crossword clue in The Daily Telegraph
D
O
O
L
I
T
T
L
E
More clues leading to the result DOOLITTLE
- Girl made grand in swindle over small amount
- As reported, mainly idle pupil of professor
- Dustman idle outside Job Centre?
- Eliot told fantastic tale of a friend to animals
- Hugh’s doctor conceals love for fower girl in bet
- Toilet breaks with old Higgins: subject of his bet during play?
- Following party, ring petite Cockney flower girl
- Romeo’s back to idle outside for Eliza
- Old toilet-trained literary parvenu
Buddy explains!
The straight part
We know that "Cockney flower girl" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cockney flower girl = doolittle.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.