Good authors initially shared stories in abundance (6)
I believe the answer is:
galore
'in abundance' is the definition.
(I've seen this before)
'good authors initially shared stories' is the wordplay.
'initially' says to take the initial letters.
'shared stories' becomes 'lore' (lore can mean a body of traditions or learning. I am not sure about the 'shared' bit.).
The first letters of 'good authors' is 'ga'.
'ga'+'lore'='GALORE'
Can you help me to learn more?
(Other definitions for galore that I've seen before include "Aplenty" , "Existing in great numbers" , "Lots of" , "to spare" , "Pussy ---, Bond girl" .)