Crossword Genius

It's said to conceal itself (3)

Ross

I believe the answer is:

art

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

'said to conceal itself' is the definition.
I can't judge whether this defines the answer.

'it's' is the wordplay.
I cannot quite see how this works, but
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is located in the answer.
The remaining letters 'ar' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for art that I've seen before include "crafty conduct" , "Beautiful or significant products of human creativity" , "Lovely piece of work" , "Work such as paintings or sculptures" , "Music, painting etc" .)

I've seen this clue in the Evening Standard.
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