Possible Clues:

• Perfume source
• It's essentially from flowers to get at the pitch of this
• From arose at the turn of 23 down
• Flower-derived perfume oil
• Rose for this at 27 across, in essence
• Essential oil from damask rose
• In essence this is the way to get at a sailor
• Oil from flowers for perfume
• Sounds as if it's sent at the pitch
• Essential oil from flower