Crossword Genius

Hearing vowels in comfort (4)

Ross

I believe the answer is:

ease

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'comfort' is the definition.
(I know that comfort can be written as ease)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for ease that I've seen before include "Assuage" , "Lack of worry or agitation" , "composure" , "Lessen intensity" , "Soothe" .)

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