During worship I dream (7)
I believe the answer is:
reverie
'dream' is the definition.
(reverie is a kind of dream)
'during worship i' is the wordplay.
'during' is an insertion indicator.
'worship' becomes 'revere' ('revere' can be a synonym of 'worship').
'revere' going around 'i' is 'REVERIE'.
(Other definitions for reverie that I've seen before include "daydreaming" , "I revere being in a state of dreaminess" , "Daydream, meditation" , "A waking dream" , "Brown study" .)