Tended sick shark beached finally (6)
I believe the answer is:
'tended sick' is the definition.
'nursed' can be an answer for 'tended' (I've seen this before). I am not sure about the 'sick' bit.
'shark beached finally' is the wordplay.
'shark' becomes 'nurse' (nurse shark is a type of shark).
'finally' suggests the final letters.
The last letter of 'beached' is 'd'.
Can you help me to learn more?
(Other definitions for nursed that I've seen before include "given medical attention" , "Tended to the sick, cared for" , "Cherished" , "Took care of the sick" , "Took care of while ill" .)