Carry on with the evidence initially after start of trial (4)
I believe the answer is:
tote
'carry' is the definition.
(I know this)
'with the evidence initially after start of trial' is the wordplay.
'with' is a charade indicator (letters next to each other).
'the' becomes 't' (the is pronounced as a 't' sound in some dialects).
'initially' indicates taking the first letters.
'after' is a charade indicator (letters next to each other).
'start' suggests taking the first letters.
The initial letter of 'evidence' is 'e'.
The first letters of 'of trial' is 'ot'.
'e' put after 'ot' is 'ote'.
't'+'ote' is 'TOTE'.
'on' is the link.
(Other definitions for tote that I've seen before include "Drag; betting system" , "Carry or shoulder" , "hump" , "record of stakeholders' investments" , "System of betting on horse races" .)