Taking off (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">taking off</span>' is the definition.<br/ ><span class="explanation-format__explanation">(less can mean take away or subtracting)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for less that I've seen before include "Smaller in amout or degree" , "In smaller quantity" , "inferior" , "See 12" , "So-called St James" .)
(Other definitions for apery that I've seen before include "Imitative behaviour - repay (anag)" , "imitation" , "Take-off" , "Mimicry" .)