Delightful content that's not too heavy (5)
I believe the answer is:
light
'not too heavy' is the definition.
'light' can be an answer for 'heavy' (thesaurus). I'm not certain of the 'not too' bit.
'delightful content' is the wordplay.
'content' says the answer is hidden in the clue (letters contained within the clue).
'LIGHT' can be found hidden inside 'delightful'.
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for light that I've seen before include "skedaddle!" , "Window; insubstantial" , "Source of illumination" , "Not having full load" , "Easily lifted" .)