Happiest sort of graveyard inscriptions (8)
I believe the answer is:
epitaphs
'graveyard inscriptions' is the definition.
'epitaphs' can be an answer for 'inscriptions' (epitaph is a kind of inscription). I'm not certain of the 'graveyard' bit.
'happiest sort' is the wordplay.
'sort' indicates anagramming the letters.
'happiest' anagrammed gives 'EPITAPHS'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for epitaphs that I've seen before include "They're written in memory of people who have died" , "Words written in memory of the dead" , "Happiest (anag)" , "Famous last words" , "words in grave situations" .)