Artist consumed by lighter battery (7)
I believe the answer is:
barrage
'battery' is the definition.
('barrage' can be a synonym of 'battery')
'artist consumed by lighter' is the wordplay.
'artist' becomes 'ra' (Royal Academician, member of Royal Academy of Arts).
'consumed by' indicates putting letters inside.
'lighter' becomes 'barge' ('barge' can be a synonym of 'lighter').
'ra' inserted into 'barge' is 'BARRAGE'.
(Other definitions for barrage that I've seen before include "Artillery bombardment; flood barrier" , "a lot of shells" , "Assault" , "Concentrated artillery bombardment" , "number of shots" .)