Be employed in Hounslow or Kennington (4)
I believe the answer is:
work
'be employed' is the definition.
(thesaurus)
'in hounslow or kennington' is the wordplay.
'in' indicates the answer is hidden within the clue.
'WORK' is hidden within 'hounslow or kennington'.
(Other definitions for work that I've seen before include "Tasks to be undertaken" , ". . . get on with serious business" , "Occupation" , "Wildly happy" , "See 5" .)