Crossword Clue:

TRIALIST one who taken part in a test

AnswerCrossword Clue
ADOPTEEOne who gets taken in
OBOISTOne who plays the duck part in "Peter and the Wolf"
LIAROne who fails a polygraph test
ACEROne who nails a test, say
CPAOne who passed a fin. test
LIAROne who doesn't pass a certain test
PRETEENOne who might test a parent's patience