Andre's system's smart indeed (6)

I believe the answer is:

dressy

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

'smart indeed' is the definition.
'dressy' can be an answer for 'smart' (I've seen this before). I am not sure about the 'indeed' bit.

'andre's system's' is the wordplay.
'DRESSY' is hidden in amongst the letters.
However, I'm not sure how this is indicated.

Can you help me to learn more?

(Other definitions for dressy that I've seen before include "Elaborate" , "Stylish with regard to clothes" , "Smartly clad, wearing stylish clothes" , "Smartly attired, wearing stylish clothes" , "swish" .)

I've seen this clue in The Sun.

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