Star of professional golf (5)

I believe the answer is:

algol

'star' is the definition.
(Algol is an example)

'of professional golf' is the wordplay.
'of' indicates a hidden word.
'ALGOL' is hidden within 'professional golf'.

(Other definitions for algol that I've seen before include "Computer language" , "Star" , "language (but not used in speech)" .)

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