Hint that's simply pointless (5)
I believe the answer is:
imply
'hint' is the definition.
(I've seen this before)
'simply pointless' is the wordplay.
'IMPLY' is hidden within the letters.
But, I am unsure how this is indicated.
'that's' is the link.
Can you help me to learn more?
(Other definitions for imply that I've seen before include "Intimate, suggest indirectly" , "Express by indirect means" , "Express indirectly" , "Insinuate, hint" , "Indicate by suggestion" .)