Preacher Avtaar’s holding a mass (4)
I believe the answer is:
imam
'preacher' is the definition.
(I have seen 'Muslim preacher ' mean 'imam' so perhaps 'preacher' could also mean 'imam')
'avtaar's holding a mass' is the wordplay.
'avtaar's holding' becomes 'im' (I can't justify this - if you can you should believe this answer much more).
'mass' becomes 'm' (symbol used in Physics e.g. f=ma).
'im'+'a'+'m'='IMAM'
Can you help me to learn more?
(Other definitions for imam that I've seen before include "Ma, I'm off to find religious Muslim" , "Islamic minister" , "Moslem prayer leader" , "Man who leads prayers in a mosque" , "Islamic prayer leader" .)