Here are the possible solutions for staircase support clue
Answer
Clue
Relevancy
newel
Clue
Staircase support
Definition
a post supporting the handrail of a staircase
rail
Clue
Staircase support
Definition
to scold in abusive or insolent language, also RAYLE
any
Clue
"... card, ___ card" (Last week: The two diagonally hidden 18-letter titles were "Up the Down Staircase" and "Upstairs, Downstairs." The latter answer turned downward at the D of "Downstairs.")