Supreme being in everything I see (5)
I believe the answer is:
allah
'supreme being' is the definition.
(Allah is an example)
'everything i see' is the wordplay.
'everything' becomes 'all' (all things).
'i see' becomes 'ah' ('ah' can be used to express understanding).
'all'+'ah'='ALLAH'
'in' acts as a link.
(Other definitions for allah that I've seen before include "God in Islam" , "God of the Muslims" , "Divinity" , "Muslim supreme being" , "God of the Arabs" .)