Venus de Milo's lack (4)
I believe the answer is:
arms
'venus de milo's lack' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for arms that I've seen before include ". . . . and the Man (G B Shaw) (4)" , "Arsenal's items?" , "Appendages" , "bombs and guns etc" , "pacifists won't take up" .)