Donor-insemination nurses wash (5)
I believe the answer is:
rinse
'wash' is the definition.
(I know that rinse is a type of wash)
'donor-insemination nurses' is the wordplay.
'nurses' indicates the answer is hidden within the clue (nurse can mean holding closely).
'RINSE' is hidden within 'donor insemination'.
(Other definitions for rinse that I've seen before include "blue one on top?" , "Sluice" , "Hair tint" , "Hair preparation" , "Wash in clean water" .)