On bagging last of five tries, go over (8)
I believe the answer is:
rehearse
'go over' is the definition.
(I've seen this before)
'on bagging last of five tries' is the wordplay.
'on' becomes 're' ('on' can be mean 'with reference to').
'bagging' indicates putting letters inside (I've seen this in other clues).
'last of' suggests the final letters.
'tries' becomes 'hears' (as in trying or hearing in a trial).
The last letter of 'five' is 'e'.
'e'+'hears'='ehears'
're' enclosing 'ehears' is 'REHEARSE'.
(Other definitions for rehearse that I've seen before include "Recite - try out" , "Practice a play" , "Go over" , "Practise like actor" , "Practise parts" .)