Put on an act in front of nurse (7)
I believe the answer is:
pretend
'put on' is the definition.
(thesaurus)
'front of nurse' is the wordplay.
'front of' becomes 'pre' (I've seen this in other clues).
'nurse' becomes 'tend' (tend can mean to nurse or look after).
'pre'+'tend'='PRETEND'
'an act in' acts as a link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for pretend that I've seen before include "Make believe - imply falsely" , "Imagined" , "keep up appearances" , "Imaginary, make-believe" , "Profess falsely" .)