Variety of shark in harbour (5)
I believe the answer is:
nurse
This might be a double definition.
'variety of shark' is the first definition.
'nurse' can be an answer for 'shark' (nurse shark is a type of shark). I am not certain of the 'variety of' bit.
'harbour' is the second definition.
(I know that harbour can be written as nurse)
'in' acts as a link.
Can you help me to learn more?
(Other definitions for nurse that I've seen before include "Carry on - - (film)" , "Runes (anag)" , "Medical worker" , "Take care" , "Type of shark" .)