Piece of advice to dump (3)
I believe the answer is:
tip
This clue is a double definition.
'piece of advice' is the first definition.
(I've seen this before)
'dump' is the second definition.
(as in a rubbish tip)
'to' is the link.
(Other definitions for tip that I've seen before include "Lean over" , "offered at end of repast" , "End - pourboire" , "Dump; extremity" , "given gratuitously" .)