Before end of truce, tries again to go over (8)
I believe the answer is:
rehearse
'go over' is the definition.
(thesaurus)
'before end of truce tries again' is the wordplay.
'before' says to put letters next to each other.
'end of' indicates one should take the final letters.
'tries again' becomes 'rehears' ('hears' can be a synonym for 'tries' so perhaps 'rehears' is OK for 'tries again').
The final letter of 'truce' is 'e'.
'e' put after 'rehears' is 'REHEARSE'.
'to' is the link.
(Other definitions for rehearse that I've seen before include "What actor does to prepare for play" , "Practice in theatre" , "Practise parts" , "Practise before performing in public" , "Train" .)