Amused about employment (3)
I believe the answer is:
use
'employment' is the definition.
(how something is used)
'amused about' is the wordplay.
'about' says the answer is hidden in the clue (the clue goes around or about the answer).
'USE' is hidden in the letters of 'amused'.
(Other definitions for use that I've seen before include "Exploit; custom" , "Practise" , "Operate" , "Employ or exploit" , "Put into service, do something with" .)