Moving stair producing musical sounds (5)
I believe the answer is:
sitar
'musical sounds' is the definition.
Although both the answer and 'sounds' are nouns, they are not in the same form of the noun. However, I know that 'musical' relates to this answer.
'moving stair' is the wordplay.
'moving' indicates anagramming the letters (letters are moved around).
'stair' anagrammed gives 'SITAR'.
'producing' is the link.
Can you help me to learn more?
(Other definitions for sitar that I've seen before include "Plucked instrument" , "Guitar-like instrument" , "music-maker" , "Indian musical instrument like long-necked lute" , "Stringed instrument of the subcontinent" .)