Suggestion at the end (3)
I believe the answer is:
tip
This clue is a double definition.
'suggestion' is the first definition.
(tip is a kind of suggestion)
'the end' is the second definition.
(tip is a kind of end)
'at' acts as a link.
(Other definitions for tip that I've seen before include "Hint about a horse" , "Point; hint" , "lots of rubbish" , "Clue" , "given gratuitously" .)