Where to defeat a policeman? (4)
I believe the answer is:
beat
'defeat a policeman?' is the definition.
'beat' can be an answer for 'defeat' (beating is a kind of defeating). I am not sure about the 'a policeman?' bit.
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for beat that I've seen before include "cane" , "Pound - defeat" , "Strike repeatedly" , "Defeat; throb" , "Throb; surpass" .)