Go away carrying current bathroom cleaner (7)
I believe the answer is:
shampoo
'bathroom cleaner' is the definition.
(something which cleans that's used in the bathroom)
'go away carrying current' is the wordplay.
'go away' becomes 'shoo' (I've seen this before**).
'carrying' means one lot of letters goes inside another.
'current' becomes 'amp' (electricity).
'shoo' enclosing 'amp' is 'SHAMPOO'.
(Other definitions for shampoo that I've seen before include "Top cleaning product" , "lather" , "Hair cleanser" , "Hair or carpet cleaner" , "Liquid cleaner" .)