Paperwork: huge amount carried by supporter in sports kit (9,6)

I believe the answer is:

badminton racket

I'm a little stuck... Click here to teach me more about this clue!

'sports kit' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?

'paperwork huge amount carried by supporter' is the wordplay.
'paperwork' becomes 'admin' (administrative work).
'huge amount' becomes 'ton' (I've seen this in another clue).
'carried by' indicates putting letters inside.
'supporter' becomes 'bracket' (I've seen this before).
'admin'+'ton'='adminton'
'adminton' inserted inside 'bracket' is 'BADMINTON RACKET'.

'in' acts as a link.

Can you help me to learn more?

(Another definition for badminton racket that I've seen is " One providing shuttle service".)

I've seen this clue in The Telegraph.

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