In article ,
Howard Neil writes

Before you start making up your own definitions, I suggest that you have
a read of:-

http://www.pesticides.gov.uk/appendices.asp?id=744


Which gives:
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Pesticide
Any substance, preparation or organism prepared or used for controlling
any pest. A pesticide product consists of one or more active substances
co-formulated with other materials. Formulated pesticides exist in many
forms, such as solid granules, powders or liquids.
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That Govt. definition is not relevant to this thread because clover is
not considered to be a pest in organic gardening.
--
Alan & Joan Gould - North Lincs.