Get up about mid-morning to wash (5)
I believe the answer is:
rinse
'wash' is the definition.
(I know that wash can be written as rinse)
'get up about mid-morning' is the wordplay.
'get up' becomes 'rise' (synonyms).
'about' means one lot of letters goes inside another.
'mid' indicates the central letters.
The central letter of 'morning' is 'n'.
'rise' enclosing 'n' is 'RINSE'.
'to' is the link.
(Other definitions for rinse that I've seen before include "Use water to remove soap" , "Hair colourant" , "Sluice" , "blue one on top?" , "Run water through" .)