Strong desire for success (8)
I believe the answer is:
ambition
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">strong desire for success</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 ambition that I've seen before include "Strong drive for success" , "Urge to better oneself" , "wanting to succeed" , "I'm in boat (anag.)" , "Desire for power, fame, etc" .)