Exam is feasible (9)
I believe the answer is:
practical
I believe this clue is a double definition.
'exam' is the first definition.
(I've seen this before)
'feasible' is the second definition.
(I've seen this before)
'is' is the link.
(Other definitions for practical that I've seen before include "Down-to-earth" , "Experiment" , "sort of joke?" , "Down to earth - like Eliot's Cats" , "Workable, feasible" .)