Trick nurse making claim (7)
I believe the answer is:
contend
'claim' is the definition.
(I know that contend is a type of claim)
'trick nurse' is the wordplay.
'trick' becomes 'con' (a con is a fraud or trick).
'nurse' becomes 'tend' (tend can mean to nurse or look after).
'con'+'tend'='CONTEND'
'making' is the link.
(Other definitions for contend that I've seen before include "fight" , "Engage in a struggle" , "Maintain" , "Compete, vie" , "Struggle (with someone)" .)