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 a hidden word.
'MASCOT' can be found hidden inside 'grandmas cottage'.
'found' acts as a 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" .)