Convenience in vacuous employers creating division between workers (9)
I believe the answer is:
handiness
'convenience in vacuous employers' is the definition.
'handiness' can be an answer for 'convenience' (handiness is a kind of convenience). I'm not certain of the 'in vacuous employers' bit.
'creating division between workers' is the wordplay.
'creating division' becomes 'ines' (I can't explain this - if you can you should believe this answer much more).
'between' means one lot of letters goes inside another.
'workers' becomes 'hands' (hand is a kind of worker).
'ines' inserted within 'hands' is 'HANDINESS'.
Can you help me to learn more?
(Another definition for handiness that I've seen is " convenience".)