### Clue: Fit to work like a horse (7)
### Answer: HARNESS 
 ### Explanation: Definition: Fit to work like a horse
  Cryptic defn, I think.  To control and make fit (to work) for one's benefit, eg. to harness the energy of your workforce to, perhaps, make them work hard like a horse?  Also, to fit a harness to a horse before making it work pulling a plough, carriage, etc.  It is a WIWD clue, with perhaps 2 slightly different surfaces?