Trite rhyme not taken seriously (5)
I believe the answer is:
light
'trite' is the definition.
(thesaurus)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for light that I've seen before include "Not having full load" , "Settle" , "Pre-eminent person; window" , "Unimportant" , "Pale" .)