Gathers, accumulates (8)
I believe the answer is:
collects
I believe this clue is a double definition.
'gathers' is the first definition.
('collect' can be a synonym of 'gather')
'accumulates' is the second definition.
('collect' can be a synonym of 'accumulate')
(Other definitions for collects that I've seen before include "Accumulates, collates" , "Gets or gathers together" , "Assembles" , "prayers" .)