Sound from stage floor (4)
'floor' is the definition.
(I know that floor can be written as base)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for base that I've seen before include "'Foundation, bottom (4)'" , "This underlying structure" , "Foot; ignoble" , "Ignoble; bottom" , "Low and contemptible" .)
'floor' is the definition.
(I've seen this in another clue)
'sound from stage' is the wordplay.
'sound from' indicates a 'sounds like' (homophone) clue.
'stage' becomes 'phase' (both can mean a part or period of something).
'phase' is a homophone of 'FAZE'.
(Other definitions for faze that I've seen before include "Disconcert, worry" , "Be disturbing" , "Disturb, disconcert" , "Throw from" , "Shake" .)