Quiet hours allowing you and me to tuck in (4)
I believe the answer is:
hush
'quiet' is the definition.
(I know that quiet can be written as hush)
'hours allowing you and me to tuck in' is the wordplay.
'hours' becomes 'h'.
'allowing you' becomes 'h' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'and' is a charade indicator (letters next to each other).
'me' becomes 'us' ('us' can mean 'me' in some dialects).
'to tuck in' indicates putting letters inside.
'h'+'h'='hh'
'hh' placed around 'us' is 'HUSH'.
(Other definitions for hush that I've seen before include "Noiselessness" , "Make or become silent or quiet" , "Make (someone) quiet" , "Mum's the word" , "Call for silence" .)