Team's good luck bringer (6)
I believe the answer is:
mascot
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">team's good luck bringer</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 mascot that I've seen before include "Lucky thing" , "Good-luck item" , "One is lucky" , "Team's good-luck bringer" , "Team's lucky person/thing" .)