(one's) Something that can be used to advantage.(idiom)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "grist" in a sentence
"The existence of the pool first became public last week when an email announcing the 2011 results was forwarded to an environmental website called grist.org."
"The miller, therefore, takes toll of the grist, which is another source of seignorial revenue, although not a very great one, for the toll is, excepting the miller's thumb rights, not very large."
"The crushed malt, called grist, is then mixed with hot water and left to stand so the starch can be converted into malt sugars."