As inquiry into the use of English as a lingua franca (ELF) increases, questions on the implications of the findings for English Language Teaching (ELT) are progressively being raised. In this regard, inquiry on misunderstanding in ELF has much to offer ELT practitioners. Awareness of what provokes misunderstanding means that learners can be trained to take relevant measures to evade the triggers that add to the problem. Amid these, ambiguity has been distinguished as a main source of ELF misunderstanding. This paper explores farther the role of ambiguity in triggering misunderstanding and explores some of the practices speakers use to enhance the explicitness of what they say. Based on conversation analytic procedures, speakers were found to increase the clarity of their talk via the use of a parenthetical remark that supplies illustration, description, definition, and comparison of similarity or dissimilarity. Learning activities that provide learners with opportunities to employ the aforementioned can add to developing in learners the capacity to communicate efficiently in lingua franca settings.