Information is needed about European society’s origin (7)
I believe the answer is:
genesis
'origin' is the definition.
(synonyms)
'information is needed about european society's' is the wordplay.
'information' becomes 'gen' (gen can informally mean information).
'needed' is a charade indicator (letters next to each other).
'about' means one lot of letters goes inside another.
'european' becomes 'E' (abbreviation e.g. EU).
'society' becomes 's' (common abbreviation in names of organisations).
'gen'+'is'='genis'
'e'+'s'='es'
'genis' placed around 'es' is 'GENESIS'.
(Other definitions for genesis that I've seen before include "Creation" , "Bible's first book" , "Band; book" , "First book of the Old Testament" , "the start of something" .)