Lucky charm from mother's bed (6)
I believe the answer is:
mascot
'lucky charm' is the definition.
(something bringing good luck)
'mother's bed' is the wordplay.
'mother's' becomes 'ma's' (ma can mean mother).
'bed' becomes 'cot' (cot is a type of bed).
'mas'+'cot'='MASCOT'
'from' acts as a link.
(Other definitions for mascot that I've seen before include "It brings good luck" , "Lucky talisman" , "Thing considered to bring good luck" , "Does it get you first place" , ".Person or thing believed to bring good luck" .)