'Please do not power up' -- checking date, it's an old, old flyer (10)

'an old old flyer' is the definition.
The definition suggests a singular noun which matches the answer.

'please do not power up checking date it's' is the wordplay.
I cannot quite understand how this works, but
'please' could be 'o' (form of address eg in an ode) and 'o' is found in the answer.
'do' is present in the answer.
'power' could be 'p' and 'p' is present in the answer.
'date' could be 'era' (I've seen this before) and 'era' is found within the answer.
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is found in the answer.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?