Profits in gas distribution (5)
I believe the answer is:
gains
'profits' is the definition.
('gain' can be a synonym of 'profit')
'in gas distribution' is the wordplay.
'distribution' indicates an anagram.
'in'+'gas'='ingas'
'ingas' anagrammed gives 'GAINS'.
(Other definitions for gains that I've seen before include "Wins" , "Profits" , "Narrows the gap" .)