Article about goddess connected with sacred writings (7)
I believe the answer is:
avestan
'connected with sacred writings' is the definition.
(I've seen this before)
'article about goddess' is the wordplay.
'article' becomes 'an' (indefinite article).
'about' indicates putting letters inside.
'goddess' becomes 'vesta' (Roman goddess).
'an' going around 'vesta' is 'AVESTAN'.
(Other definitions for avestan that I've seen before include "Thus spake Zarathustra" , "relating to ancient Iranian language" , "connected with sacred writings" .)