Crossword Genius

One gallery featured in film (7)

Ross

I believe the answer is:

acetate

'film' is the definition.
(type of material)

'one gallery' is the wordplay.
'one' becomes 'ace' (ace has a value of one in some card games).
'gallery' becomes 'tate' (Tate Modern, Tate Britain etc).
'ace'+'tate'='ACETATE'

'featured in' is the link.

(Other definitions for acetate that I've seen before include "Transparent film" , "film on overhead projector" , "Transparency; textile fibre" , "Textile fibre, plastic" , "Demo disc" .)

I've seen this clue in The Independent.
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