Assembles (7)
'assembles' is the definition.
(I know this)
This is the entire clue.
(Other definitions for gathers that I've seen before include "Draws together" , "Collects in one place" , "Harvests" , "Understands" , "Assembles" .)
(Other definitions for rallies that I've seen before include "court exchanges?" , "Gets better" , "Recovers in health" , "Mobilizes" , "Extended exchanges of tennis strokes" .)