Below are possible answers for the crossword clue Lacking in substance.
6 letter answer(s) to lacking in substance
ANEMIC
lacking vigor or energy; "an anemic attempt to hit the baseball"
relating to anemia or suffering from anemia
4 letter answer(s) to lacking in substance
THIN
(of sound) lacking resonance or volume; "a thin feeble cry"
lacking excess flesh; "you can't be too rich or too thin"; "Yon Cassius has a lean and hungry look"-Shakespeare
lacking spirit or sincere effort; "a thin smile"
lacking substance or significance;
lessen the strength or flavor of a solution or mixture; "cut bourbon"
lose thickness; become thin or thinner
make thin or thinner; "Thin the solution"
not dense; "a thin beard"; "trees were sparse"
of relatively small extent from one surface to the opposite or in cross section; "thin wire"; "a thin chiffon blouse"; "a thin book"; "a thin layer of paint"
relatively thin in consistency or low in density; not viscous; "air is thin at high altitudes"; "a thin soup"; "skimmed milk is much thinner than whole milk"; "thin oil"
take off weight
very narrow; "a thin line across the page"
without viscosity; "the blood was flowin
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