Trivial hackneyed stuff after spicy stuff (10)
I believe the answer is:
peppercorn
'trivial' is the definition.
(I've seen this in another clue)
'hackneyed stuff after spicy stuff' is the wordplay.
'hackneyed stuff' becomes 'corn' (as in cliched or corny material).
'after' means one lot of letters go next to another.
'spicy stuff' becomes 'pepper' (I can't explain this - if you can you should believe this answer much more).
'corn' after 'pepper' is 'PEPPERCORN'.
Can you help me to learn more?
(Other definitions for peppercorn that I've seen before include ">something spicy" , "providing little income for landlord" , "(Of rent) notional" , "See this ground by mill" , "Dried spice berry - symbol of token payment" .)