Get up about noon to wash (5)
I believe the answer is:
rinse
'wash' is the definition.
(I know that rinse is a type of wash)
'get up about noon' is the wordplay.
'get up' becomes 'rise' (synonyms).
'about' is an insertion indicator.
'noon' becomes 'n'.
'rise' going around 'n' is 'RINSE'.
'to' is the link.
(Other definitions for rinse that I've seen before include "Flush" , "Hair colourant" , "Wash without using soap" , "Sluice" , "Run water through" .)