Provides relaxation in eastern seas, maybe (5)

I believe the answer is:

eases

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'provides relaxation' is the definition.
I can't judge whether this defines the answer.

'eastern seas maybe' is the wordplay.
'eastern' becomes 'e'.
'maybe' is an anagram indicator.
'seas' with letters rearranged gives 'ases'.
'e'+'ases'='EASES'

'in' is the link.

Can you help me to learn more?

(Other definitions for eases that I've seen before include "Borders, margins" , "Softens" , "Moderates" , "Alleviates, relieves" , "Moves carefully" .)

I've seen this clue in The Irish News.

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