Crossword Genius

Partner's painting (3)

Ross

I believe the answer is:

art

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

'painting' is the definition.
(painting is an art)

'partner's' is the wordplay.
'ART' is hidden within the letters.
But, I am unsure how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for art that I've seen before include "Trickery" , "For example, Blakey's creative" , "Cunning" , "A name" , "Eg, paintings, sculpture" .)

I've seen this clue in The Mirror.
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