Everybody I see follows God (5)
I believe the answer is:
allah
'god' is the definition.
(Arabic name for God)
'everybody i see follows' is the wordplay.
'everybody' becomes 'all' (all people).
'i see' becomes 'ah' ('ah' can be used to express understanding).
'follows' means one lot of letters go next to another.
'all'+'ah'='ALLAH'
(Other definitions for allah that I've seen before include "God of the Arabs" , "God worshipped in 5 Across" , "God in Islam" , "Muslim and Arab name of God" , "Divinity" .)