Some in Ur see harbour (5)
I believe the answer is:
nurse
'harbour' is the definition.
(I know that harbour can be written as nurse)
'some in ur see' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'NURSE' can be found hidden inside 'in ur see'.
(Other definitions for nurse that I've seen before include "Nourish" , "Type of shark" , "Runes (anag)" , "Hospital carer" , "Carer for the sick; shark" .)