It's all right to go in the day before to call up (5)
I believe the answer is:
evoke
'call up' is the definition.
(synonyms)
'it's all right to go in the day before' is the wordplay.
'it's all right' becomes 'ok' (synonyms).
'to go in' is an insertion indicator.
'the day before' becomes 'eve' (the eve of something is the night before).
'ok' going into 'eve' is 'EVOKE'.
'to' is the link.
(Other definitions for evoke that I've seen before include "Conjure up" , "Call up memories of feelings" , "Awaken memories in the mind" , "Kindle (memory)" , "call-up" .)