Complex chapter framing current statistician's plan (3,5)
I believe the answer is:
pie chart
'statistician's plan' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'complex chapter framing current' is the wordplay.
'complex' indicates anagramming the letters.
'framing' is an insertion indicator (inserted letters are framed by the outside letters).
'current' becomes 'I' (physics symbol).
'chapter' with letters rearranged gives 'pechart'.
'pechart' going around 'i' is 'PIE CHART'.
Can you help me to learn more?
(Other definitions for pie chart that I've seen before include "Display of information" , "Display of data r" , "Illustration of shares" , "Graph of a circle divided into sectors" , "Circle divided by radii to depict percentages of the whole" .)