Get up about noon and wash (5)
I believe the answer is:
rinse
'wash' is the definition.
(I know that wash can be written as rinse)
'get up about noon' is the wordplay.
'get up' becomes 'rise' (synonyms).
'about' means one lot of letters goes inside another.
'noon' becomes 'n' (abbreviation for noon).
'rise' enclosing 'n' is 'RINSE'.
'and' is the link.
(Other definitions for rinse that I've seen before include "Colour" , "blue one on top?" , "Mouth cleansing solution" , "Swill out" , "Sluice" .)