Victor welcomed by Islamic group is a divinity (5)
I believe the answer is:
shiva
'a divinity' is the definition.
(Shiva is an example)
'victor welcomed by islamic group' is the wordplay.
'victor' becomes 'V' (phonetic alphabet: alpha, bravo, charlie etc.).
'welcomed by' is an insertion indicator (letters welcomed inside).
'islamic group' becomes 'Shia' (one of the main branches of Islam along with Sunni).
'v' put into 'shia' is 'SHIVA'.
'is' is the link.
(Other definitions for shiva that I've seen before include "Hindu god, the destroyer" , "Major Hindu deity (the destroyer)" , "Jewish period of mourning" , "Destroyer goddess of Hinduism" , "powerful deity" .)