Mum with northerner, the lucky beast (6)
I believe the answer is:
mascot
'lucky beast' is the definition.
The answer and definition can be both people as well as being singular nouns.
I also know that 'lucky' relates to this answer.
'mum with northerner' is the wordplay.
'mum' becomes 'ma' (ma can mean mother).
'with' means one lot of letters go next to another.
'northerner' becomes 'scot' (someone from Scotland).
'ma'+'scot'='MASCOT'
'the' is the link.
Can you help me to learn more?
(Other definitions for mascot that I've seen before include "Good-luck charm" , "Bringer of good luck to team, etc" , "It's adopted by a team as a symbolic figure" , "Something bringing luck" , "Lucky person" .)