Lucky charm found in grandma's cottage (6)
I believe the answer is:
mascot
'lucky charm' is the definition.
(something bringing good luck)
'in grandma's cottage' is the wordplay.
'in' indicates the answer is hidden within the clue.
'MASCOT' is hidden within 'grandmas cottage'.
'found' is the link.
(Other definitions for mascot that I've seen before include "Lucky talisman" , "One is lucky" , "One for good luck" , "Team's good luck bringer" , "Good luck token" .)