Unreliable sort (5)
(Other definitions for flake that I've seen before include "Small flat scale" , "Flat thin fragment" , "Small piece of snow" , "A little snow" , "Chipped piece of stone" .)
(Other definitions for liar that I've seen before include "Worse than a thief" , "27 [DECEIVER]" , "Dishonest person" , "Story teller?" , "Storyteller" .)