Collage application

I think it could be either:

Which length description are you looking for?:

paste

'collage application' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for paste that I've seen before include "Wallpaper glue" , "Food prepared for spreading" , "not real rock" , "It is used to stick wallpaper" , "Creamy, sticky, or doughy mixture" .)

I've seen this clue in The New York Times.

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