Reveal the day is near (8)
I believe the answer is:
disclose
'reveal' is the definition.
(I know that reveal can be written as disclose)
'day is near' is the wordplay.
'day' becomes 'd' (abbreviation for day).
'near' becomes 'close' (synonyms).
'd'+'is'+'close'='DISCLOSE'
'the' is the link.
(Other definitions for disclose that I've seen before include "Is closed in order to expose to view" , "Betray" , "show" , "Divulge or expose" , "Announce" .)