Most heated feeling of dread about boundless grief (8)
I believe the answer is:
angriest
'most heated' is the definition.
Both the definition and answer are superlative adjectives. Perhaps there's a link between them I don't understand?
'feeling of dread about boundless grief' is the wordplay.
'feeling of dread' becomes 'angst' (I've seen this in another clue).
'about' is an insertion indicator.
'boundless' indicates the central letters (the limits or bounds of the word are removed).
The middle letters of 'grief' are 'rie'.
'angst' going around 'rie' is 'ANGRIEST'.
Can you help me to learn more?
(Other definitions for angriest that I've seen before include "Most incensed kind of ingrates" , "Extremely mad" , "Most irate and furious" , "Most characteristic of 1950s young men" , "Most annoyed or hostile" .)