Drop wrong end of stick (4)
I believe the answer is:
sink
'drop' is the definition.
(I know that drop is a is a more specific form of the action of sink)
'wrong end of stick' is the wordplay.
'wrong' becomes 'sin' (wrong can mean a sin or crime).
'end of' indicates one should take the final letters.
The last letter of 'stick' is 'k'.
'sin'+'k'='SINK'
(Other definitions for sink that I've seen before include "Go down; wash basin" , "Disappear below the surface" , "something needed in kitchen" , "Plunge down" , "Drop beneath the water - kitchen appliance" .)