Atlantic liner docked, located by a satellite (7)
I believe the answer is:
titania
'satellite' is the definition.
(Titania is a moon of Uranus)
'atlantic liner docked located by a' is the wordplay.
'atlantic liner' becomes 'Titanic' (liner that sank in the Atlantic).
'docked' means to remove the last letter (to dock can mean to remove the tail of an animal).
'located by' says to put letters next to each other.
'titanic' with its last letter removed is 'titani'.
'titani'+'a'='TITANIA'
(Other definitions for titania that I've seen before include "Oberon's queen (MND)" , "Shakespeare's queen of the fairies" , "Bottom attracts me" , "Queen of the fairies - Uranus satellite" , "Fairy Queen (MND)" .)