Poet's time? It appears twice daily on one (3,2,5)

'poet's time?' is the definition.
(time mentioned in a poem by Rupert Brooke)

'it appears twice daily on one' is the wordplay.
I cannot really see how this works, but
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is found within the answer.
'on' could be 're' ('on' can be mean 'with reference to') and 're' is found in the answer.
'one' could be 'the' (both can introduce a definite example of something) and 'the' is located in the remaining letters.
The remaining letters 'ento' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...