Whale fat (7)
I believe the answer is:
blubber
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">whale fat</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 blubber that I've seen before include "Break down" , "Cry uncontrollably" , "Fat of sea mammals - cry" , "Layer of fat under the skin of whales" , "Sob bitterly" .)