Drawing empty, large arrow
like this?
it is drawn as node shape ...
\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{pgfplots}
\pgfplotsset{width=10cm,compat=1.15}
\usetikzlibrary{shapes.arrows}
\begin{document}
\begin{center}
\begin{tikzpicture}
\draw[blue!30] (0,0) grid[step=1] + (8,-5);
\node[draw, single arrow,
minimum height=33mm, minimum width=8mm,
single arrow head extend=2mm,
anchor=west, rotate=-60] at (4,-1) {};
\end{tikzpicture}
\end{center}
\end{document}
\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{shapes.arrows}
\begin{document}
\begin{tikzpicture}[every node/.style={single arrow, draw=none, rotate=0}]
%\draw[step=0.5,very thin,black!20] (-2,-2) grid (2,2);
\draw[help lines,step=.2] (-2,-2) grid (7,4);
\draw[help lines,line width=.6pt,step=1] (-2,-2) grid (7,4);
\foreach \x in {-2,-1,0,1,2,3,4,5,6,7}
\node[anchor=north] at (\x,-2) {\x};
\foreach \y in {-2,-1,0,1,2,3,4}
\node[anchor=east] at (-2,\y) {\y};
\node [draw=black] {\phantom {hdhdhhhdhdhdh}};
\end{tikzpicture}
\end{document}