Possible Clues:

• In essence, that's what's at the top of 4 down (5)
• Oil of rose petals, e.g.
• Send out roses
• Can you get at the sailor smelling of roses?
• The last thing you'd do with hundreds, that's to say
• Essentially, Rose gets at the sailor
• Is a seaman smelling of roses?
• Essentially rose at the pitch
• In essence, that''s the way to get at a sailor
• Fragrant oil obtained from floweres