Upright film detective (5)

I believe the answer is:

shaft

I believe this clue is a double definition.

'upright' is the first definition.
(shaft is a kind of upright)

'film detective' is the second definition.
(film character John Shaft)

(Other definitions for shaft that I've seen before include "Beam of light" , "fleece" , "Beam - well" , "Ray (of sunlight)" , "Vertical mine access" .)

I've seen this clue in The Guardian.

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