Saw stuff covered up by beleaguered US Treasury (4)

I believe the answer is:

dust

'saw stuff' is the definition.
'dust' can be an answer for 'stuff' (dust is a kind of stuff). I'm unsure of the 'saw' bit.

'covered up by beleaguered us treasury' is the wordplay.
'DUST' is hidden within the letters.
But, I am unsure how the hidden word is indicated.

(Other definitions for dust that I've seen before include "Clean; fine powder" , "Tiny particles of dirt, skin flakes etc" , "Powdery dirt in dry areas" , "Clean - dirt" , "Fine dirt particles" .)

I've seen this clue in the Irish Times (Crosaire) and the Irish Times.

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