Oliver, filmed in three dimensions (4)

I believe the answer is:

reed

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

'in three dimensions' is the wordplay.
'in' indicates a hidden word.
'REED' is hidden in the letters of 'three dimensions'.

'filmed' is the link.
This may not be right. It may be part of another bit of the clue.

Can you help me to learn more?

(Other definitions for reed that I've seen before include "Riverside grass" , "Carol" , "Stalk" , "Marsh plant with tall straight stem" , "Tall water-loving grass" .)

I've seen this clue in the Evening Standard.

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