### Clue: On the outskirts of Omaruru wasted food rots in the open air (3-2-5)
### Answer: OUT-OF-DOORS 
 ### Explanation: Definition: in the open air
  OU(first and last letters,outskirts of "Omaruru", in Namibia if you want to know) + **anagram of**(wasted) FOOD ROTS. 
Answer: Before it became shortened to "outdoors".