3 words for AAACCTT 1-letter words

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1 letter (3)

a c t
Poet’s word, with inverted comma, for the end of the day
?
E
?
E
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N
Hint 1 meaning
The old plural of Eye.
Hint 2 anagram
ENE
Hint 3 another clue
AND STILL ___
15 +1