Well-endowed, society bores thrive marvellously at last (6)
I believe the answer is:
bosomy
'well-endowed' is the definition.
Both the definition and answer are adjectives.
Maybe they are linked in a way I don't understand?
'society bores thrive marvellously at last' is the wordplay.
'society' becomes 's' (common abbreviation in names of organisations).
'bores' indicates putting letters inside (bore can mean to drill into).
'thrive' becomes 'boom' (synonyms).
'at last' indicates one should take the final letters.
The final letter of 'marvellously' is 'y'.
's' placed within 'boom' is 'bosom'.
'bosom'+'y'='BOSOMY'
Can you help me to learn more?
(Another definition for bosomy that I've seen is " Rubenesque?".)