Animal has a right to be more croaky (7)

I believe the answer is:

hoarser

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'more croaky' is the definition.
Both the answer and definition are comparative adjectives. Maybe they are linked in a way I don't understand?

'animal has a right' is the wordplay.
'animal' becomes 'horse' (type of animal).
'has' means one lot of letters goes inside another.
'right' becomes 'r' (common abbreviation).
'horse' going around 'a' is 'hoarse'.
'hoarse'+'r'='HOARSER'

'to be' acts as a link.

Can you help me to learn more?

(Other definitions for hoarser that I've seen before include "Rougher-sounding" , "More husky" .)

I've seen this clue in The Daily Express.

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