Able to be done (8)
(Other definitions for possible that I've seen before include "Capable of being achieved" , "Capable of happening" , "Conceivable, practicable" , "Feasible achievable" , "Achievable, able to be done" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">able to be done</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 feasible that I've seen before include "is likely to work" , "Base life (anag.)" , "workable" , "Capable of being done" , "An idea" .)