Drum up Italy’s junior outfit (8)

I believe the answer is:

playsuit

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

'outfit' is the definition.
(I know that playsuit is a type of outfit)

'drum up italy's junior' is the wordplay.
'up italy's' anagrams to 'PLAYSUIT'.
However, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for playsuit that I've seen before include "Baby's garment" , "Baby's onesie" .)

I've seen this clue in the Sydney Morning Herald.

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