Get up about noon initially and wash (5)
I believe the answer is:
rinse
'wash' is the definition.
(rinse is a kind of wash)
'get up about noon initially' is the wordplay.
'get up' becomes 'rise' ('rise' can be a synonym of 'get up'**).
'about' indicates putting letters inside.
'initially' says to take the initial letters.
The first letter of 'noon' is 'n'.
'rise' going around 'n' is 'RINSE'.
'and' acts as a link.
(Other definitions for rinse that I've seen before include "Wash without using soap" , "Hair tint" , "Hair preparation" , "Run water through" , "Wash off surface dirt" .)