Possible Clues:

• One sticks up for maximum rate at sea
• Hairpiece that's best on granny, say
• Crest of hair or ribbon on crown of head
• Crest — tuft of hair
• Decoration on head
• Decorative ribbon worn on top of head
• Vessel overturned by bow crest
• Decorative bow on head
• Go at more than 1,850 metres per hour overhead
• Growth as high as it could be