Editing strange tale on the fight game (8)
I believe the answer is:
altering
'editing' is the definition.
(altering is a kind of editing)
'strange tale on the fight game' is the wordplay.
'strange' is an anagram indicator.
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'the fight game' becomes 'ring' (I can't explain this - if you can you should give a lot more credence to this answer).
'tale' with letters rearranged gives 'alte'.
'alte'+'ring'='ALTERING'
Can you help me to learn more?
(Other definitions for altering that I've seen before include "making a change" , "revising" , "Modifying, changing" , "Changing -- 1 across (anag)" , "Making changes" .)