Overscrupulousness from Edward filling larder (8)

I believe the answer is:

pedantry

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'overscrupulousness' is the definition.
Both the definition and answer are singular nouns.
Perhaps they are linked in a way I don't understand?

'edward filling larder' is the wordplay.
'edward' becomes 'Ed' (short for Edward).
'filling' means one lot of letters goes inside another.
'larder' becomes 'pantry' (synonyms).
'ed' placed inside 'pantry' is 'PEDANTRY'.

'from' is the link.

Can you help me to learn more?

(Other definitions for pedantry that I've seen before include "Stuffiness" , "Unduly rigorous formality" , "excessive formality" , "Den party (anag.)" , "a particular habit?" .)

I've seen this clue in The Telegraph.

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