### Clue: Noise primarily in boor — or boar? (4)
### Answer: OINK 
 ### Explanation: Definition: Noise primarily in boor — or boar
  N(initial letter,primarily of "noise) **containing**(in) OIK(British slang for oaf,lout,boor)
Defn: Noise made by a boor, if you decide to call him a pig as well, and a boar, a real pig.  A nice WIWD (Wordplay Intertwined With Definition) clue.