Crossword Genius

Served us tea with grit in it (4)

Ross

I believe the answer is:

dust

I'm a little stuck... Click here to teach me more about this clue!

'grit in it' is the definition.
I can't tell whether this definition defines the answer.

'served us tea with' is the wordplay.
'with' indicates a hidden word.
'DUST' is hidden in the letters of 'served us tea'.

Can you help me to learn more?

(Other definitions for dust that I've seen before include "Clean; fine powder" , "Powdery dirt in dry areas" , "The mortal remains" , "Fine dirt particles" , "Unwanted fine powder" .)

I've seen this clue in The Mirror.
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