Being ignorant, I abandoned everything on date (8)
I believe the answer is:
unversed
'being ignorant' is the definition.
(synonyms)
'i abandoned everything on date' is the wordplay.
'abandoned' suggests deleting specific letters.
'everything' becomes 'universe' (everything in the universe).
'on' means one lot of letters go next to another.
'date' becomes 'd' (common abbreviation eg in DOB, date of birth).
'universe' with 'i' removed is 'unverse'.
'unverse'+'d'='UNVERSED'
(Other definitions for unversed that I've seen before include "Lacking skill" , "Green" , "Not experienced or skilled" , "Not in rhyme" .)