talk through

verb (tr)

(adverb) to discuss (a problem or situation) in detail
(preposition) to explain to (a person) all the stages of a processask a friend to talk you through the exercise

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012