Possible Clues:

• Use a disguise we're told
• Advantage of a disguise, reportedly
• Help to make a curtain, say
• Use beneficially
• A cover is said to help
• What help can there be for one in lava back there?
• Benefit afforded by a yashmak, they say
• Provide help; profit
• Can one help being in what comes up out of the volcano?
• help, benefit