RADA graduate loathes piano frames (8)

I believe the answer is:

thespian

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

'rada graduate' is the definition.
I can't tell whether this defines the answer.

'loathes piano frames' is the wordplay.
'THESPIAN' is hidden in amongst the letters.
But, I am not sure how this is indicated.

Can you help me to learn more?

(Other definitions for thespian that I've seen before include "Stage actor" , "Tragic actor" , "stage performer" , "Theatrical performer" , "Dramatic performer" .)

I've seen this clue in The Guardian.

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