Feed like a duck (6)
I believe the answer is:
dabble
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">feed like a duck</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 dabble that I've seen before include "Take cursory interest (in)" , "Work (at) frivolously" , "Take dilettante interest (in)" , "Try something briefly and superficially" , "Take desultory interest" .)