Tended sick shark beached finally (6)
I believe the answer is:
nursed
'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'.
'nurse'+'d'='NURSED'
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" .)