Possible Clues:

• Fantastic teacher shone no end, a dependable sort?
• Emergency naval item the female put on ship reportedly
• It may prevent ship hitting side of harbour or rock
• The horse can, when trained, become one to rely on
• Something ship relies upon in emergencies
• Female film compère, one relied on in emergency
• Female attached to ship do we hear is a dependable sort
• Paper-weight?
• Stormy Horn teaches it is the last refuge for sailors