Sportively go the whole ninety minutes? (9)

I believe the answer is:

playfully

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'sportively' is the definition.
Both the answer and definition are adverbs. Maybe you can see a link between them that I don't see?

'go the whole ninety minutes?' is the wordplay.
'go' becomes 'play' (playing is a kind of going).
'the whole ninety minutes?' becomes 'fully' (I am not sure about this - if you are sure you should believe this answer much more).
'play'+'fully'='PLAYFULLY'

Can you help me to learn more?

I've seen this clue in the Evening Standard.

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