Tumble (4)
'tumble' is the definition.
(I know that roll is a more specific form of the action the tumble)
This is the entire clue.
(Other definitions for roll that I've seen before include "Swell" , "Schedule" , "Small rounded bread" , "Move like a ball" , "At school it may be called" .)
'tumble' is the definition.
(synonyms)
This is all the clue.
(Other definitions for fall that I've seen before include "Tumble, drop" , "Stateside season" , "The American autumn" , "Autumn - trip" , "Sudden decline" .)