Crossword Genius

Travel document shown by directors in Golf? I don’t know (8,4)

Ross

I believe the answer is:

boarding pass

'travel document' is the definition.
(I've seen this before)

'directors in golf? i don't know' is the wordplay.
'directors' becomes 'board' (board of directors).
'golf?' becomes 'g' (phonetic alphabet: alpha, bravo, charlie etc.).
'i don't know' becomes 'pass' (e.g. response in a quiz).
'board'+'in'+'g'+'pass'='BOARDING PASS'

'shown by' acts as a link.

(Other definitions for boarding pass that I've seen before include "travel document" , "prerequisite for high-flyers?" .)

I've seen this clue in The Times.
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