Observe details on gallery (8)

I believe the answer is:

spectate

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

'details on gallery' is the wordplay.
'details on' becomes 'spec' (I am not sure about this - if you are sure you should believe this answer much more).
'gallery' becomes 'tate' (Tate Modern, Tate Britain etc).
'spec'+'tate'='SPECTATE'

Can you help me to learn more?

(Other definitions for spectate that I've seen before include "Perhaps enjoy sport" , "Observe" , "Look on (at a match)" , "Be an onlooker" , "View" .)

I've seen this clue in The Daily Express.

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