Acclaim Rolling Stones once they hit the floor? (4)
I believe the answer is:
hail
I believe this clue is a double definition.
'acclaim' is the first definition.
('hail' can be a synonym of 'acclaim')
'rolling stones once they hit the floor?' is the second definition.
(Other definitions for hail that I've seen before include "Signal to and summon, say a taxi" , "arrival from the heavens" , "Falling ice pellets" , "Fall of ice" , "a drop of the hard stuff?" .)