From Longman Dictionary of Contemporary Englishcash cropˈcash crop noun [countable] TACa crop grown in order to be sold rather than to be used by the people growing it → subsistence crop at subsistence(2)
Examples from the Corpus
cash crop• Thus it is both a cash crop and a fodder crop.• Why don't producer nations simply switch crops and either become more self-sufficient in food, or produce a different cash crop?• Coffee was introduced into the central highlands in the 1840s, and quickly became the most important cash crop.• Wine formed the most important cash crop, while cereal production generally took the form of subsistence farming.• Poppies are a major cash crop.• Potatoes are the only cash crop though even some of these are used for fodder.From Longman Business Dictionarycash cropˈcash cropFARMING a crop that a farmer grows to sell for money rather than to live on or uselarge farms growing cash crops such as tea, coffee, cocoa, rubber → crop 