Crossword Genius

Make tea or coffee in this, we hear (4)

Ross

I believe the answer is:

earn

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'make' is the definition.
(as in making money)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for earn that I've seen before include "Gain by work or merit" , "Twist out of shape" , "Merit (a reward)" , "Pull in" , "Near (anag.)" .)

I've seen this clue in The Guardian.
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