Part of head office could be here (6)
I believe the answer is:
temple
I believe this clue is a double definition.
'part of head' is the first definition.
('temple' is part of 'head')
'office could be here' is the second definition.
(office can mean a series of prayers)
(Other definitions for temple that I've seen before include "Side of the head or religious building" , "Mormon church" , "Shrine" , "Capital feature" , "Delicate spot on the head" .)