Here are the possible solutions for just plain terrible clue
Answer
Clue
Relevancy
awful
Clue
Just plain terrible
Just terrible
Definition
horrible
ohgodno
Clue
"That's a terrible, terrible idea!"
steppe
Clue
Rather plain plain
Plain plain
isnt
Clue
"Man, this just ___ my day!" ("I'm having terrible luck!")
majorcrimes
Clue
"Maybe I'll add a bright, cheerful chord just before the last note," said Johnny, playing a C-E-G triad on the piano. He frowned. "Terrible! I'd be committing ___ with that E in there."