Efficient (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">efficient</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for able that I've seen before include "Having the ability to do something" , "As capable as a mariner" , "Competent, having ability" , "... was I ere I saw Elba (palindrome)" , "With the required capacities" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">efficient</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for capable that I've seen before include "Of a person, competent" , "Efficient" , "Able, proficient" , "accomplished" , "'Clever, able (7)'" .)