The struggle to get ahead (3,4)
I believe the answer is:
rat race
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">the struggle to get ahead</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 rat race that I've seen before include "The struggle for survival" , "Competition for power" , "Competitive way of life" , "Scramble to succeed" , "Life seen as competition" .)