Glasses in singular display (9)

I believe the answer is:

spectacle

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This clue might be a double definition.

'glasses' is the first definition.
(thesaurus)

'singular display' is the second definition.
'spectacle' can be an answer for 'display' (spectacle is a kind of display). I'm not sure about the 'singular' bit.

'in' acts as a link.

Can you help me to learn more?

(Other definitions for spectacle that I've seen before include "worth looking at" , "sensational event" , "Striking 25 [SIGHT]" , "Wonder" , "Impressive public sight" .)

I've seen this clue in the Sydney Morning Herald.

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