### Clue: Horse docked before bovine about 22 September? (7)
### Answer: EQUINOX 
 ### Explanation: Definition: about 22 September
 "equine"(a horse) **minus its last letter**(docked) **placed above**(before, in a down clue) OX(a bovine).
Defn: About when the autumnal equinox in the northern hemisphere and the vernal equinox in the southern hemisphere, occurs.