### Clue: Slowly shift PC and get Apple, good but oddly deficient (4)
### Answer: PLOD 
 ### Explanation: Definition: Slowly shift,PC
  "Apple" **minus its 1st, 3rd, and 5th letters **+ "good" **minus its 1st and 3rd letters**(… but oddly deficient, for each word).
Double defn: 2nd: Slang for a policeman;a PC(abbrev. for "police constable")