Crossword Genius

Between drinks, Republican starts to cry (5,2)

Ross

I believe the answer is:

tears up

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

'starts to cry' is the definition.
(I've seen this in another clue)

'between drinks republican' is the wordplay.
I cannot really understand how this works, but
'republican' could be 'r' (abbreviation in US politics) and 'r' is found within the answer.
'drinks' could be 'teas' (tea is a kind of drink) and 'teas' is present in the remaining letters.
The remaining letters 'up' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for tears up that I've seen before include "Shreds" , "Cancels" .)

I've seen this clue in The Independent.
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