Talk about adding extra section to sporting event (7)

I believe the answer is:

discuss

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'talk about' is the definition.
(to discuss something is to talk about it)

'section to sporting event' is the wordplay.
'section' becomes 's' (legal abbreviation).
'to sporting' is an insertion indicator (inserted letters wear or 'sport' others).
'event' becomes 'discus' (athletics event).
's' placed into 'discus' is 'DISCUSS'.

'adding extra' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for discuss that I've seen before include "Debate" , "Talk about (something)" , "Argue" , "Go into" , "Consider" .)

I've seen this clue in The Independent.

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