Use the pink end of a pencil (5)
I believe the answer is:
erase
'use the pink end of a pencil' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for erase that I've seen before include "Obliterate" , "Efface" , "Rub out, expunge" , "Scratch" , "To remove all trace" .)