Lift beams in auditorium (5)
I believe the answer is:
raise
'lift' is the definition.
(I know that lift can be written as raise)
'beams in auditorium' is the wordplay.
'beams' becomes 'rays' (rays of light).
'in auditorium' indicates a 'sounds like' (homophone) clue (as the word might sound to an audience).
'rays' is a homophone of 'RAISE'.
(Other definitions for raise that I've seen before include "jack up" , "Aries (anag)" , "Lift - increase" , "Lift, elevate" , "More money from America" .)