### Clue: Sweeper in drama school at top of road (5)
### Answer: RADAR 
 ### Explanation: Definition: Sweeper
 R.A.D.A.(abbrev. for the Royal Academy of Dramatic Art;the UK drama school) **plus**(at) **the 1st letter of**(top of, in a down clue) "road".
Defn: Equipment that sweeps the surrounding space with radio waves.