Initiating another session about action on pitch (9)

I believe the answer is:

rebooting

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'initiating another session about action' is the definition.
I can't tell whether this definition defines the answer.

'on pitch' is the wordplay.
'on' becomes 're' ('on' can be mean 'with reference to').
'pitch' becomes 'booting' (I can't justify this - if you can you should believe this answer much more).
're'+'booting'='REBOOTING'

Can you help me to learn more?

I've seen this clue in The Independent.

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