Crossword Genius

According to Venetians, sightseer wears smart suit, minus first brace (7)

Ross

I believe the answer is:

turista

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

'according to venetians sightseer wears smart suit minus' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'first brace' is the wordplay.
I cannot quite understand how this works, but
'first' could be 'ist' (ist resembles 1st) and 'ist' is found within the answer.
This explanation may well be incorrect...

Can you help me to learn more?

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