Most glowing reports initially - studied busily (8)
I believe the answer is:
ruddiest
'most glowing' is the definition.
Both the definition and answer are superlative adjectives. Perhaps you can see an association between them that I don't see?
'reports initially studied busily' is the wordplay.
I cannot really understand how this works, but
an anagram of 'studied' is 'uddiest' which is located in the answer.
A single letter 'r' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for ruddiest that I've seen before include "Most florid complexion" , "Most blushing" , "Having the healthiest reddish colour" .)