Moslem star back home? (5)
I believe the answer is:
sunni
'moslem' is the definition.
(Sunni is an example)
'star back home?' is the wordplay.
'star' becomes 'sun' (Sun is an example).
'back' is a reversal indicator.
'home?' becomes 'in' ('he's home' can mean 'he's in').
'in' back-to-front is 'ni'.
'sun'+'ni'='SUNNI'
(Other definitions for sunni that I've seen before include "Moslem" , "A main branch of Islam" , "Form of religion" , "Indian fig tree with aerial roots" , "Islamic faction" .)