WordNet (r) 3.0 (2006):

cross question
    v 1: question closely, or question a witness that has already
         been questioned by the opposing side; "The witness was
         cross-examined by the defense" [syn: cross examine,
         cross question]

Moby Thesaurus II by Grady Ward, 1.0:

35 Moby Thesaurus words for "cross question":
   bone of contention, catechism, cross-examine, cross-interrogate,
   cross-interrogatory, debating point, demand, extract information,
   feeler, go over, grill, inquiry, inquisition, interrogation,
   interrogative, interrogatory, issue, leader, leading question,
   make inquisition, moot point, point at issue, point in question,
   problem, pry out, query, question, question at issue,
   question mark, quodlibet, roast, third-degree, topic,
   trial balloon, vexed question