Possible Clues:

• Univ. seniors' challenge
• Srs. may take it
• It consists of a General Test and Subject Test: Abbr.
• Test taken by some college srs
• Big brother of the SAT
• Test for a sr.
• M.A. pursuer's test
• Score in a univ. application
• Test taken by a college sr
• Collegian’s hurdle: Abbr.