Servant girl grabbing Romeo's tool (6)
I believe the answer is:
wrench
'tool' is the definition.
(wrench is a kind of tool)
'servant girl grabbing romeo's' is the wordplay.
'servant girl' becomes 'wench' (I've seen this before).
'grabbing' indicates putting letters inside.
'romeo' becomes 'r' (phonetic alphabet: alpha, bravo, charlie etc.).
'wench' going around 'r' is 'WRENCH'.
(Other definitions for wrench that I've seen before include "appliance" , "Twist violently around" , "Sprain - difficult parting" , "Type of spanner" , "Emotional pain felt on parting" .)