Spiritual leader, one with mother in Newcastle? (4)
I believe the answer is:
imam
'spiritual leader' is the definition.
(prayer leader in Islam)
'one with mother in newcastle?' is the wordplay.
'one' becomes 'i' (Roman numeral).
'with' is a charade indicator (letters next to each other).
'mother in newcastle?' becomes 'mam' (Northern English term for one's mother).
'i'+'mam'='IMAM'
(Other definitions for imam that I've seen before include "Islamic minister" , "Prayer-leader in a mosque" , "Maim (anag)" , "Leader of prayers in mosque" , "Person leading devotions in a mosque" .)