Show or leave out, right at the beginning (6)
I believe the answer is:
reveal
'show' is the definition.
(synonyms)
'leave out right at the beginning' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'right' becomes 'r' (common abbreviation).
'at the beginning' is a charade indicator (letters next to each other) (some letters go at the beginning of others).
'leave' with letters rearranged gives 'eveal'.
'eveal' put after 'r' is 'REVEAL'.
'or' is the link.
(Other definitions for reveal that I've seen before include "Expose, remove covering" , "Make known to others" , "Show, uncover" , "Divulge; make visible" , "Leak" .)