Good-luck animal (6)
I believe the answer is:
mascot
'good-luck animal' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for mascot that I've seen before include "'Symbol, for a team say (6)'" , "Thing supposed to bring good luck" , "good luck charm required" , "Team's good-luck bringer" , "Lucky charm" .)