Crossword Genius

Fool grabbing Oscar, say? One is in court who knows the stars (14)

Ross

I believe the answer is:

astrophysicist

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

'fool grabbing oscar say? one is in court who knows the stars' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

'oscar say? one is in court who knows the stars' is the wordplay.
I cannot really see how this works, but
'oscar' could be 'o' (phonetic alphabet: alpha, bravo, charlie etc.) and 'o' is located in the answer.
'say?' could be 'as' (I've seen this in other clues) and 'as' is present in the answer.
'one' could be 'i' (Roman numeral) and 'i' is found in the answer.
'is' is within the answer.
'court' could be 'ct' (abbreviation used in road names) and 'ct' is located in the leftover letters.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for astrophysicist that I've seen before include "One studying properties of stars and interstellar matter" , "One studying composition of stars, etc" , "... [ASEROID DISCOVERED] by such a man, perhaps" , "space expert" .)

I've seen this clue in The Times.
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