Crossword Genius

Depraved Republican's off to arouse a Liberal (7)

Ross

I believe the answer is:

bestial

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

'depraved' is the definition.
Both the definition and answer are adjectives. Perhaps they are linked in a way I don't understand?

'republican's off to arouse a liberal' is the wordplay.
I cannot quite understand how this works, but
'a' is present in the answer.
'to' could be 'til' (I've seen this in another clue) and 'til' is present in the leftover letters.
The remaining letters 'bes' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for bestial that I've seen before include "Animal-like" , "for animals?" , "Like an animal; depraved" , "Tables I create, being brutal or cruel" , "Brutish or cruel, hardly human" .)

I've seen this clue in The Times.
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