The most common and most likely answer to this crossword clue is the 7 letter word ARMLESS
A
R
M
L
E
S
S
More clues leading to the result ARMLESS
Buddy explains!
The straight part
We know that "Posing no threat to Cockneys/like the Venus de Milo" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case posing no threat to cockneys/like the venus de milo = armless.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.