Somehow got a beat to subside (5)

I believe the answer is:

abate

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

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

'somehow got a beat' is the wordplay.
'a beat' can be anagrammed to 'ABATE'.
But, I am not clear how the anagram is indicated.

'to' acts as a link.

Can you help me to learn more?

(Other definitions for abate that I've seen before include "Become less strong like storm" , "Become less in intensity" , "Wane" , "Lessen - cease" , "(Flood) recede" .)

I've seen this clue in The Mirror.

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