Goes back over and raises bar on keyboard (6)
I believe the answer is:
recaps
'goes back over and raises bar' is the definition.
I can't judge whether this defines the answer.
'on keyboard' is the wordplay.
'on' becomes 're' ('on' can be mean 'with reference to').
'keyboard' becomes 'caps' (I can't explain this - if you can you should believe this answer much more).
're'+'caps'='RECAPS'
Can you help me to learn more?
(Other definitions for recaps that I've seen before include "Summarises at the end" , "Summarises briefly" , "In brief, state again the main points" , "Such summaries" , "Reviews" .)