End with a helpful suggestion (3)
I believe the answer is:
tip
I believe this clue is a double definition.
'end' is the first definition.
(I know that tip is a type of end)
'helpful suggestion' is the second definition.
(I've seen this before)
'with a' is the link.
(Other definitions for tip that I've seen before include "Useful hint; end" , "present!" , "The extreme end of something" , "Piece of useful advice" , "lots of rubbish" .)