Left-leaning member of the board? (9)
I believe the answer is:
backslash
'left-leaning member of the board?' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for backslash that I've seen before include "line on computer screen" , "character" , "//www.crosswordgiant.com/crossword-clue/1252911/" , "One leaning to the left" , "Mark" .)