Possible Clues:

• Fashionable new flues being of service
• Employable
• Some refuse full-bodied wine, beneficial as it may be
• Sounds as if to use with oneself may come in handy
• It's handy for the fuel we get
• Able to help us with fuel product
• Serviceable or functional
• Give us some fuel - that's not just ornamental
• Practicable
• Smart fuels could be of benefit