Gather for prayer (7)
I believe the answer is:
collect
This clue is a double definition.
'gather' is the first definition.
(I know that gather can be written as collect)
'for prayer' is the second definition.
(collect is a type of prayer)
(Other definitions for collect that I've seen before include "Amass; a prayer" , "Assemble - a short prayer" , "How people in America may be called" , "mass" , "Accumulate" .)