Answer:

rud

Answer	Crossword Clue
RUD	President Hayes' nickname
RUD	Red ocher: Dial.
RUD	Steering blade: Abbr.

RUD	Carplike fish: Var.
RUD	Hari ..., Asian river
RUD	Carplike fish
RUD	Hari ..., river in Afghanistan
RUD	Steering mech.

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.