Saw nurses at work — so gifted! (7)
I believe the answer is:
donated
'gifted' is the definition.
(donating is a kind of gifting)
'saw nurses at work' is the wordplay.
'saw' becomes 'dated' ('date' can be a synonym of 'see').
'nurses' means one lot of letters goes inside another.
'at work' becomes 'on'.
'dated' enclosing 'on' is 'DONATED'.
'so' is the link.
(Other definitions for donated that I've seen before include "Presented" , "Given" , "Gave" .)