A grand player perhaps from his score (7)

I believe the answer is:

pianist

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

'a grand player' is the definition.
'pianist' can be an answer for 'player' (pianist is a kind of player). I'm not certain of the 'a grand' bit.

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for pianist that I've seen before include "Ivories tinkler" , "Keyboard player" , "key performer" , "Musician" , "Key expert" .)

I've seen this clue in The Globe and Mail.

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