I tuck stars into my casual wear (5,5)

I believe the answer is:

track suits

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

'my casual wear' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'i tuck stars' is the wordplay.
'i tuck stars' can be anagrammed to 'TRACK SUITS'.
But, I am not clear how the anagram is indicated.

'into' acts as a link.

Can you help me to learn more?

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

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