### Clue: The top parts of it could easily conceal Arctic permafrost (6)
### Answer: ICECAP 
 ### Explanation: Definition: The top parts of it could easily conceal Arctic permafrost
 **The 1st letters, respectively, of**(The top parts of) "it could easily conceal Arctic permafrost".
Defn: The "it" in the clue. A WIWD (wordplay intertwined with definition) clue.