problem, subject

QUESTION
List of words for the clue problem, subject from the crossword:
ACNE EGO SMOG APNEA ODOR ACHE STYE MATH DTS ECON DEBT LISP TOPIC NAM AGE EDEMA PEA ISSUE INERTIA ESTATE
WordClue
TOPICsubject
COMPLEXproblem
INQUIRYquestion, problem
PROBLEMquestion, subject
CONNOISSEURsubject-matter expert
QUESTIONproblem, inquiry
ALGORITHMprocedure