Art (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">art</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for skill that I've seen before include "Aptitude" , "Ability acquired by training" , "Expertise; art" , "Expertise, dexterity" , "Ability - dexterity" .)
(Other definitions for deco that I've seen before include "Art's partner" , "Style of design popular in the 1920s and 1930s" , "Art -, C 20 style of ornamentation" .)