Have an inclination to be a nurse (4)
I believe the answer is:
tend
I believe this is a triple definition!
'have an inclination' is the first definition.
(I've seen this in another clue)
'to be' is the second definition.
(tending is a kind of being)
'a nurse' is the third definition.
(tend can mean to nurse or look after)
(Other definitions for tend that I've seen before include "Head" , "Look after (a patient)" , "Incline, lean" , "Be predisposed, or care for" , "Be inclined - look after" .)