The moving stair makes 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.
'the moving stair' is the wordplay.
'the moving' is an anagram indicator.
'stair' anagrammed gives 'SITAR'.
'makes' is the link.
Can you help me to learn more?
(Other definitions for sitar that I've seen before include "Indian string instrument" , "Long necked and often plucked" , "It takes pluck" , "Guitar-like instrument" , "Indian musical instrument like long-necked lute" .)