5 words for AIOPPSS 1-letter words

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1 letter (5)

a i o p s
Poet’s word, with inverted comma, for the end of the day
?
E
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E
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N
Hint 1 meaning
The old plural of Eye.
Hint 2 anagram
NEE
Hint 3 another clue
AND STILL ___
10 +2