Heavenly being is over us in prayer (7)
I believe the answer is:
angelus
'prayer' is the definition.
(Angelus is an example)
'heavenly being is over us' is the wordplay.
'heavenly being' becomes 'angel' (I've seen this before).
'is over' says to put letters next to each other.
'angel'+'us'='ANGELUS'
'in' is the link.
(Other definitions for angelus that I've seen before include "Church bell" , "Short prayer" , "Thrice daily prayer of Roman Catholics" , "(Bell calling Catholics to) prayer" , "Prayer at noon and 6pm" .)