Hang nudes in new arrangement over small piano (7)
I believe the answer is:
suspend
'hang' is the definition.
(I know that suspend is a type of hang)
'nudes in new arrangement over small piano' is the wordplay.
'in new arrangement' indicates anagramming the letters (I've seen this in other clues).
'over' indicates putting letters inside.
'small' becomes 's' (abbreviation - e.g. clothes size).
'piano' becomes 'p' (musical abbreviation).
'nudes' is an anagram of 'suend'.
's'+'p'='sp'
'suend' placed around 'sp' is 'SUSPEND'.
(Other definitions for suspend that I've seen before include "Sends up (anag)" , "Delay" , "Adjourn" , "Keep in abeyance" , "Stay" .)