Right after organising sale of beam (5)
I believe the answer is:
laser
'beam' is the definition.
(laser beam is a kind of beam)
'right after organising sale' is the wordplay.
'right' becomes 'r' (abbreviation).
'after' means one lot of letters go next to another.
'organising' is an anagram indicator.
'sale' with letters rearranged gives 'lase'.
'r' put after 'lase' is 'LASER'.
'of' acts as a link.
(Other definitions for laser that I've seen before include "Coherent light-beam" , "Source of light; type of printer" , "Intense light generator" , "type of surgery" , "Device producing thin beam of light" .)