Temperature taken by last nurse (4)
I believe the answer is:
tend
'nurse' is the definition.
(tend can mean to nurse or look after)
'temperature taken by last' is the wordplay.
'temperature' becomes 't' (abbreviation).
'taken by' means one lot of letters go next to another.
'last' becomes 'end' (I've seen this in another clue).
't'+'end'='TEND'
(Other definitions for tend that I've seen before include "Look after - there's a dent in it" , "Incline; cultivate" , "See to" , "Look after, or take certain direction" , "Be predisposed, or care for" .)