Strips of light paper with black plastic seam (8)
I believe the answer is:
sunbeams
'strips of light' is the definition.
Although both the answer and definition are plural nouns, I cannot understand how one could define the other.
'paper with black plastic seam' is the wordplay.
'paper' becomes 'sun' (The Sun, UK newspaper).
'with' is an insertion indicator.
'black' becomes 'b' (as in pencil classifications).
'plastic' is an anagram indicator (plastic can mean easily moulded).
'seam' with letters rearranged gives 'eams'.
'b' put into 'eams' is 'beams'.
'sun'+'beams'='SUNBEAMS'
Can you help me to learn more?
(Other definitions for sunbeams that I've seen before include "They provide light" , "daylight?" .)