Goddess, second one, encountered sun god rising (7)
I believe the answer is:
artemis
'goddess' is the definition.
(I've seen this before)
'second one encountered sun god rising' is the wordplay.
'second' becomes 's' (common abbreviation).
'one' becomes 'i' (Roman numeral).
'encountered' becomes 'met' ('meet' can be a synonym of 'encounter').
'sun god' becomes 'ra'.
'rising' says the letters should be written backwards (going up in a down clue).
's'+'i'+'met'+'ra'='simetra'
'simetra' back-to-front is 'ARTEMIS'.
(Other definitions for artemis that I've seen before include "Head-hunter" , "Huntress daughter of Zeus" , "Mythical Greek huntress" , "Apollo's twin sister" , "God" .)